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Bitfloor Indefinitely Suspends Bitcoin Trading

PerformanceDude writes "Bitfloor (a New York-based online exchange for Bitcoin) yesterday made the following announcement on their website: I am sorry to announce that due to circumstances outside of our control BitFloor must cease all trading operations indefinitely. Unfortunately, our US bank account is scheduled to be closed and we can no longer provide the same level of USD deposits and withdrawals as we have in the past. As such, I have made the decision to halt operations and return all funds. Over the next days we will be working with all clients to ensure that everyone receives their funds. Please be patient as we process your request. Roman — bitfloor.com" According to the company's Twitter account, money should be returned to users' bank accounts shortly.

44 of 291 comments (clear)

  1. A likely story by Anonymous Coward · · Score: 3, Insightful

    Sounds like the govenrment finally decided they didn't like money outside their control.

    1. Re:A likely story by travdaddy · · Score: 5, Insightful

      Sounds like the govenrment finally decided they didn't like money outside their control.

      Sounds to me like they were a US company not following already existing US Anti-Money Laundering regulations.

      --
      Adidas To Bring Back Sneakernet
    2. Re:A likely story by localman57 · · Score: 4, Interesting

      Sounds like the govenrment finally decided they didn't like money outside their control.

      Maybe. Or maybe their bank just wasn't comfortable with them. Where I work we sometimes will pass on working with potential customers just because we get a bad business feel for them. Whatever bank they're dealing with may not want to risk being negatively associated in the press with any of a variety of bad things that could potentially happen with this bitcoin exchange if they aren't an important enough customer to justify that risk.

      The other thing I think is interesting is the degree to which this matters. The whole point of bitcoin is that it is supposed to be some independent currency. But it seems to rise and fall an awful lot depending on the degree to which you can exchange it for dollars. Which would tend to indicate that it does require backing at some level from dollars.

    3. Re:A likely story by rmstar · · Score: 3, Insightful

      The regulators requires that money laundering is kept in check.

      Which, frankly, is a good thing.

      BitCoin prevents that and therefore, among other reasons, it will become increasingly difficult to exchange bitcoin and the established currencies.

      Maybe, maybe not.

      To be freely tradable this kind of financial product (let's stop that ridiculous "currency" bullshit) requires some type of legal framework that isn't available. If it ever gets it, you could trade bitcoins as easily as shares. But as it stands, and aside from money laundring issues, you could as well prosecute bitcoin trading on the grounds that it is illegal gambling.

      Of course, a sound legal framework for bitcoins would most likely make them pointless.

    4. Re:A likely story by AlphaWolf_HK · · Score: 5, Informative

      How would money laundering provide tax evasion? The point of money laundering is to convert dirty money (e.g. money gained from selling drugs, gambling, bankruptcy fraud) into clean money that you're "supposed" to have. Clean money by its nature is taxed.

      --
      Careful with names containing L slashdot.org/~AiphaWolf_HK slashdot.org/~AlphaWoif_HK slashdot.org/~AiphaWoif_HK
    5. Re:A likely story by gl4ss · · Score: 2

      How would money laundering provide tax evasion? The point of money laundering is to convert dirty money (e.g. money gained from selling drugs, gambling, bankruptcy fraud) into clean money that you're "supposed" to have. Clean money by its nature is taxed.

      plenty of money that is dirty is dirty because evaded taxes on it.

      I'm not so sure if bitcoin itself is so masterful for money laundering. sure, you can use it to move the cash through it, but you still end up holding the cash you had in the first place with no good explanation of why you had that wealth...

      --
      world was created 5 seconds before this post as it is.
    6. Re:A likely story by Sperbels · · Score: 3, Insightful

      And when an upstanding rich American citizen puts his money in a tax haven, he's merely investing overseas...putting his hard earned money to work for me. When the not so rich people do it, it's tax evasion. Gotta love this country.

    7. Re:A likely story by Begemot · · Score: 3, Interesting

      Same happened in Israel 2 weeks ago - all accounts of bitcoin exchange companies were closed until further notice. They didn't even give them a chance to return funds to their customers.

    8. Re:A likely story by Richard_at_work · · Score: 3, Interesting

      It would be interesting to see how many people don't want bitcoin to be "controlled" by governments through legal avenues, but at the same time would want the law enforcement agencies to investigate any cases where bitcoin exchanges disappear overnight with their clients "funds"...

    9. Re:A likely story by oreaq · · Score: 2

      It seems to be trading at about $92 USD, which is approximately where it was before bitfloor's announcement.

      6 months ago a bitcoin was $5, 6 months before that it was $35. The fluctuation is massive.

    10. Re:A likely story by h4rr4r · · Score: 3, Interesting

      Disney dollars are not real currency, they are coupons.

      Try to get disney to convert them back to USD for you.

    11. Re:A likely story by thejynxed · · Score: 2

      No, it's actually quite good for it.

      Example: Person A with illicit funds buys Bitcoins with said funds. Person A then has associate B place buy orders. Person A then proceeds to sell their Bitcoins to associate B by fulfilling the buy order. Associate B then is able to then turn around and sell to unwitting dupes C through Z, garnering now "clean" cash for person A without person A having to report any of it to tax authorities.

      --
      @Mindless Drivel: 100% of Twitter posts ever Tweeted.
    12. Re:A likely story by ShanghaiBill · · Score: 4, Interesting

      you still end up holding the cash you had in the first place with no good explanation of why you had that wealth...

      There are plenty of reasons to be holding cash that you didn't pay tax on. For instance:

      1. Set up a shell corporation in a tax haven (e.g. The Cayman Islands).
      2. Transfer your IP assets (patents, copyrights, trademarks) to this corporation.
      3. Pay a license fee to this corporation for the use of that IP. Make sure the amount of the fee matches your profits.
      4. Pay no income tax, because you have no profit.
      5. Borrow the money back from the shell corp. Loans are not considered income and are not taxable.
      6. Life a nice life while going deeper and deeper into debt to yourself .
      7. Eventually you die, and all the debts are cancelled.

      Of course, this is not tax evasion because it is perfectly legal.

    13. Re:A likely story by pepty · · Score: 2

      Works great for Pfizer, though they put their IP holding company in Ireland instead.

    14. Re:A likely story by Anonymous Coward · · Score: 4, Informative

      1. Set up a shell corporation in a tax haven (e.g. The Cayman Islands).
      2. Transfer your IP assets (patents, copyrights, trademarks) to this corporation.
      3. Pay a license fee to this corporation for the use of that IP. Make sure the amount of the fee matches your profits.
      4. Pay no income tax, because you have no profit.
      5. Borrow the money back from the shell corp. Loans are not considered income and are not taxable.
      6. Life a nice life while going deeper and deeper into debt to yourself .
      7. Eventually you die, and all the debts are cancelled.

      Of course, this is not tax evasion because it is perfectly legal.

      This is not true. See IRS Form 5471. The rules are exceptionally complex, even by the standards of US tax law, but in general a US person cannot control a foreign investment corporation (such as your Cayman shell corp) and not pay tax on its income, because its income is US income (income from licensing the IP in the US). Loans from a controlled company back into the US to the controller can be considered distributions of income in some circumstances, such as these.

      Note - what Google et al are doing in its Irish/Bermuda company is accumulating foreign (non-US) income from intellectual property. This is different.

    15. Re:A likely story by lgw · · Score: 2

      It's not yet a currency, for the reason Forbes pointed out: too much fluctuation in value to have the practical utility required for one. The only legitimate appeal of, or need for, an alternative currency is that it's more stable than government currencies. Maybe bitcoin will be that one day, but that day is not today.

      --
      Socialism: a lie told by totalitarians and believed by fools.
    16. Re:A likely story by ShanghaiBill · · Score: 2, Insightful

      2. Transfer your IP assets (patents, copyrights, trademarks) to this corporation.

      If the IRS believes you are selling assets to an external entity at well below market value, then you will owe taxes based on what the IRS believes the market value to be.

      Simple solution used by many companies: Locate your R&D labs and creative workers outside the USA, so there is no transfer of IP from IRS jurisdiction. American corporate tax policy has been designed to collect almost zero revenue, while simultaneously discouraging the creation of jobs for Americans, thus resulting in less revenue from payroll and personal income tax as well. Is it any wonder that we are broke?

  2. Clearly this is the work of... by Anne_Nonymous · · Score: 4, Funny

    >> US bank account is scheduled to be closed

    Clearly this is the work of the Illuminati Lizard People.

    1. Re:Clearly this is the work of... by Anonymous Coward · · Score: 5, Funny

      Lizard People

      We prefer "Reptilian-American", thank you.

    2. Re:Clearly this is the work of... by Sponge+Bath · · Score: 2

      "Laugh-a while you can, monkey-boy." - Dr. Lizardo

  3. Down to $90 already, how low can it go? by h4rr4r · · Score: 3, Insightful

    Bitcoin is already down to $90, where is that $1000 bitcoin troll at now?

    Money has to at least be a short term store of value. If bread costs twice as much in the evening as it does in the morning no one will want your currency. Bitcoin is not doing well on that front. I am sure all the early folks are cashing out now and laughing all the way to the bank though.

    1. Re:Down to $90 already, how low can it go? by ultranova · · Score: 2

      Bitcoin is already down to $90, where is that $1000 bitcoin troll at now?

      You do realize that $90/BTC is still over twice what it was before the bubble, right?

      I am sure all the early folks are cashing out now and laughing all the way to the bank though.

      As are those who bought in the after-bubble crash, before the price rebounced to the current level.

      --

      Forget magic. Any technology distinguishable from divine power is insufficiently advanced.

    2. Re:Down to $90 already, how low can it go? by alexgieg · · Score: 4, Informative

      Bitcoin is already down to $90, where is that $1000 bitcoin troll at now?

      $1000? If the Bitcoin theory becomes true some day in the future (a huge if) and it were to replace national currencies for the entire world (an even huger if), it might end up valued at more than $3.4 million each (at 2013 valuation). The math is simple. Current global GDP is about $72 trillion, BTCs are capped at about 21 million, hence $72 trillion / 21 million BTC ~= $3.4 million per BTC at cap time. If this were today then people would use it at 6 decimal places (microBTCs) as the day to day currency, equivalent to about $3.40, and the maximum divisibility of 8 places, equivalent to about ~$0.034, as the corresponding "cents", said valuations adjusting upwards (in terms of purchasing power) at roughly 4% per year accompanying the increase in global GDP.

      I doubt any of that'll happen though. For one, governments don't want monetary power outside their hands. For another, most economists around are convinced ("convinced" as in "I believe in it from the bottom of my heart!" and "My preferred theorist said so and his equations are so pretty and I have tons of faith in him!") that deflation is evil. And third, drugs, porn, drugs, weapons, drugs, tax, drugs, pedophilia, and won't anyone please think of the children!?

      --
      Conservatism: (n.) love of the existing evils. Liberalism: (n.) desire to substitute new evils for the existing ones.
    3. Re:Down to $90 already, how low can it go? by dkleinsc · · Score: 5, Informative

      For another, most economists around are convinced ... that deflation is evil.

      Those egghead economists have several good reasons to think that deflation is a problem:
      1. It strongly encourages everyone to stuff their money in the mattress rather than spend it. This may seem like a great idea, but without people buying stuff, nobody is needed to make stuff, which means people lose their jobs, so they buy even less, and so on.

      2. It means that anyone who is saving is more likely to stuff the money in the mattress than they are to invest it. For example, if cash is gaining value at 1.5% a year, you're less likely to take the risk on an investment with 4% return than you will if cash is losing value at 1.5% a year. Which again causes people to lose their jobs, so they buy less, so others lose their jobs, so they buy less, and so on.

      3. Bank lending would grind to a halt, for two reasons: First, banks have to add the deflation into the interest rates of any loans, to account for their opportunity cost compared to just keeping onto the money. Second, borrowers know that they have to repay the loan using progressively more and more valuable dollars, and are rightly concerned that this is a really bad idea.

      4. Behavioral research suggests that wages and prices do not deflate as they should - workers have a strong resistance to taking what appears to be wage cuts every year, and businesses have a strong resistance to showing what appears to be lower profits on the same product.

      5. People, businesses, and governments who are currently borrowing money get crushed, because their debt becomes progressively more pricey to pay off. That's exactly the problem that was motivating the bimetalism movement back in the 1890's, after the dollar was in deflation for about 2 decades.

      It's not just equations: There are several historical examples of deflation, and many of the theorized problems with deflation have in fact turned up.

      --
      I am officially gone from /. Long live http://www.soylentnews.com/
  4. Blanks. Fill them in. by CuteSteveJobs · · Score: 4, Insightful

    > Unfortunately, our US bank account is scheduled to be closed and we can no longer provide the same level of USD deposits and withdrawals as we have in the past.

    Is it me or is that the most understated sentence ever written?

    1. Re:Blanks. Fill them in. by Anonymous Coward · · Score: 5, Funny

      Well in fairness to them, it sounds a lot better than "we decided to hop on the bitcoin-ponzi-scheme bandwagon and it bit us in the ass."

  5. You Answered It Yourself by eldavojohn · · Score: 3, Insightful

    Bitcoin is already down to $90, where is that $1000 bitcoin troll at now? ... [all the early folks are] cashing out now and laughing all the way to the bank though.

    Sounds like you just answered your own question.

    --
    My work here is dung.
  6. Re:And so it begins by h4rr4r · · Score: 4, Insightful

    There is no conspiracy here. No one cares about this toy money. They broke already existing federal anti-laundering laws so this happened. They could have followed the law and been able to stay open.

  7. So when is Slashdot by Black+Parrot · · Score: 2

    going to indefinitely suspend its bitcoin stories?

    --
    Sheesh, evil *and* a jerk. -- Jade
    1. Re:So when is Slashdot by DiSKiLLeR · · Score: 5, Insightful

      Never. Why on earth would it? Crypto-currencies are a fascinating concept and Bitcoin is one of the greatest experiments ever. Whether it ultimately succeeds or fails is irrelevant, it will be written into the history books forever.

      --
      You can tell how powerful someone is by the magnitude of the crime they can commit and be able to get away with.
    2. Re:So when is Slashdot by DerekLyons · · Score: 2

      Crypto-currencies are a fascinating concept

      When I read that, cryptozoology ("a pseudoscience involving the search for animals whose existence has not been proven") was what sprang to mind...

  8. Re:Why? by Black+Parrot · · Score: 4, Funny

    What's is the story here?

    This is Slashdot: The story is "bitcoin something something".

    --
    Sheesh, evil *and* a jerk. -- Jade
  9. Re:And so it begins by pla · · Score: 2

    There is no conspiracy here.

    I find it curious that you post so much BS to Bitcoin threads that I actually recognize your handle at this point.


    No one cares about this toy money.

    Even a speculative bubble doesn't hit $90 if "no one cares" about the underlying asset. Quite the opposite - So many people have an interest in Bitcoin, whether legitimate or speculation, than its market capitalization last week qualified it as a mid cap (and it still plays in the same ballpark despite the post-$250 sell-off).


    They broke already existing federal anti-laundering laws so this happened. They could have followed the law and been able to stay open.

    You have made an assertion about a company's business practices without a shred of evidence. They may have violated money laundering laws. They may have used the wrong type of account (ie, personal checking) for running a business they didn't expect to grow so fast. They may simply have scared a bank that wanted nothing do with Bitcoin (much like the EFF's stance on Bitcoin donations) simply because it would distract them from their core mission. You know nothing about which of those, or dozens of other possibilities, actually happened.

    Stick with (incorrectly) calling it a pyramid scheme - At least that, not having an immediate victim of your accusation, doesn't count as libel.

  10. Re:Bubble by Registered+Coward+v2 · · Score: 2

    You’re making a lot of assumptions. Like, BitCoins will tend to go up in value over your time period (be it in days or years). That you will actually be able to execute on a displayed priced – before everybody else does.

    Suggestion - find (and read up on) a arbitrage opportunity. For example, a US dollars / BitCons / Eurs / US Dollar trade should net you zero dollars less fees – but does it? I have heard of times that it has not and could be taken advantage of. Also, try to find somebody who knows something about program stock trading – which is basically what you are doing. (and stay away from those green arrows / red arrows FX trading programs you see on TV)

    Excellant points. One of the problems with bitcoins is there is no assurance of liquidity; unlike many other commodities or real currencies. For arbitrage to work you have to be able to buy and sell when you want so you can take advantage of the opportunity; ideally at the same time so you never really put any of your money at risk. Bitcoin, OTOH, operates on the well known "greater fool" theory that drives many speculative bubbles such as tulips. You hope someone somewhere will pay more for it than you did; even though there is no underlying reason for them to do so other than they believe they will go even higher. They have no unique value behind them; anyone can create a new crypto chain separate from bitcoin and if they convince people the new bytecoin is better than bitcoin then bitcoins will cease to have value. In the end, there is no control over the amount of cryptocurrency in circulation despite promises otherwise. The one valid comparison of bitcoins to money is that, like money, any country can decide to issue it and in what quantity; its value will depend on people's faith in the issuer.

    --
    I'm a consultant - I convert gibberish into cash-flow.
  11. Re:Why? by squiggleslash · · Score: 3, Funny

    I'm not in a position to judge. So let me speculate based upon my own prejudices and stupidity.

    What this obviously proves is that THE MAN hates freedom and is hating Bitcoins so has leaned on the bank (though didn't need to be because the bank IS THE MAN too) to close down Bitcoins which are totally a legitimate currency because you can exchange CPU cycles for Bitcoins which is much better than the dollar because the dollar can be made to hyperinflate by printing more although it doesn't whereas Bitcoins never have inflation because they're based on CPU cycles and its just its success that means it keeps oscillating between $50 and $200 every few months. This is simply another case where the MAFIAA are trying to shut us down because we threaten their business model by selling things that have value because they're products of really big prime numbers which everyone knows are totally worth thousands of dollars.

    (c) 50% of Slashdot posters.

    --
    You are not alone. This is not normal. None of this is normal.
  12. Re:Bubble by squiggleslash · · Score: 3, Informative

    The higher the volatility the lower the returns

    Surprisingly, no. It can be a great way to make a lot of money.

    Take a look at http://en.wikipedia.org/wiki/Dollar_cost_averaging, and then do some basic scenarios. The key thing is that if there's a lot of oscillating between two extremes, then putting the same amount of money into an investment vehicle over a period of time will result in fairly substantial growth of your account - even if, on average, the vehicle itself never gains value.

    The system works because when you put in the same amount of cash (rather than buy the same number of securities) basic math is working in your favor. Put $1000 when Bitcoins are worth $200, and when the price collapses to $50, that part of your investment is worth $250 - a $750 loss.

    However, put $1000 in when they're $50, and when the price rises to $200, that part of your investment is worth $4000, a $3000 gain. If you're putting the same amount of money in at intervals unrelated to the rise and fall of the currency, then on average, you should have as many "$1000 at $200s" as you have "$1000 at $50s".

    Of course, the algorithm wouldn't be useful unless you're in the black most of the time even when the currency isn't at its extremes. If you assume that usually it'll float around the $125 range (half way between $50 and $200), then the loss on the $1000@$200 investments will be $375, and the gains on the $1000@$50 "only" look like $1500. You're still making more than 100% return at that rate.

    This is a fairly normal investment scheme FWIW and is part of the logic behind most pension systems. Of course, the stock market doesn't fluctuate anything like as much as Bitcoins do. On the other hand, very few people believe that the stock market will ever collapse entirely.

    The danger with this scheme is that there's no guarantee Bitcoins aren't going to permanently collapse, and that would cause your investment to be wiped out. I'm not going to do it in large part for that reason. The amounts involved to make this useful are much higher than I'm willing to bet at the moment.

    --
    You are not alone. This is not normal. None of this is normal.
  13. Bitcoin is a speculative commodity, not a currency by davidwr · · Score: 2

    In this sense it's like Gold, except:

    * probably more vendors take BitCoin than gold as payment (i.e. both gold and BitCoin have some value as a currency/barter, and BitCoin may actually have more, but neither is primarily a currency)
    * You can't make jewelry, do dental work, or make Monster Cables with BitCoin (i.e. unlike the shiny metal, it has no inherent value)

    --
    Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
  14. Re:Bubble by sFurbo · · Score: 2

    Whenever something sounds too good to be true, you have to ask yourself if it is. In this case, id it were that easy, why haven't other people done it? My guess would be that the price development is clear in retrospect, but hard to predict. How would you know when it is going to peak? How would you know if the bottom have been reached, or if it just plateaued before the real drop?

    In the long run, it is really hard to beat the market.

  15. I suspect it was transaction reports... by sirwired · · Score: 2

    I suspect it was Transaction Reporting requirements, along with Know Your Customer regulations that did them in. The government doesn't care if you are shoveling Benjamins, BitCoins, Euros, Pesos, or British Pounds, across the counter or over the wire... if you want to trade in heavy quantities of Cash or Cash Equivalents, you have to comply with money laundering laws. If their bank felt they could not keep the account open and still comply with those laws... ker-chop!

    Did the fact that BitCoins were being traded have something to do with it? You bet. But they would have been equally eager to shut down an operation dealing with physical currency and numbered accounts... they don't like anonymiity combined with large volumes of untracable cash.

  16. Re:Bubble by alexander_686 · · Score: 2

    Dollar cost averaging is great (and I did mention it’s cousin, regular rebalancing) – but your point is a bit off base.

    One of the underlying assumptions of dollar cost averaging is that you are investing in a productive assets that grows with time. Sometimes you are buying too high, sometimes you are getting a steal by buying too low, but you are always buying productive assets. It is a simple discipline that counteracts the unproductive emotional habits of people pilling money into and out of the market. After a few years of investing you should have a sufficient investment where your compound rate of return / interest takes over.

    Which is volatility comes into play. The higher the volatility the lower compounded returns.

    But currencies are not a productive asset – it just sits there. It is like buying gold coins each month a burying it. You won’t know how many gold coins you will have at the end of 10 years because the number will change each month depending on the value of gold. And you won’t know how much their worth because, once again, you won’t know the value of gold in 10 years. Without the compounding affect the value of dollar cost averaging drops.

  17. Re:Monney Laundering != Out of the government by lgw · · Score: 2

    You could pretty document every transaction you've performed to you government, and government couldn't do much about it,

    If the government knows your bitcoin transactions, then they have all the control they could need or want, as ordinary laws can then cover anything you do with those bitcoins.

    And on the other side, bitcoins have some level of secrecy/untraceability built-in.

    Not at all. Every bitcoin transaction is announced to the entire network - it's the most traceable currency in history. You can bet the NSA has a database with every bitcoin transaction made starting at some recent point, and in the future will be able to unwind the entire history of any bitcoins in your wallet. What the government wouldn't like would be an anonymous bitcoin exchange - they need to couple bitcoin wallets to identities at the borders of the system, and they do have the power to enforce that.

    --
    Socialism: a lie told by totalitarians and believed by fools.
  18. Re: Bubble by ultranova · · Score: 3, Interesting

    The problem here is that unlike stocks, there is absolutely ZERO value in a bitcoin. It represents exactly nothing of value. Stocks at least have a book value and a P/E Ratio of the company behind the stock. Bitcoins are backed by nothing.

    Bitcoins are backed by the utility of being able to send them between people without having to deal with any third parties. They present the value of everything that can be bought with Bitcoins; as that set is slowly growing, so is the value of Bitcoin. It's a classic network effect.

    To bet on Bitcoin is to bet that PayPal, Visa, and banks will continue screwing their customers, which seems like a pretty safe bet.

    --

    Forget magic. Any technology distinguishable from divine power is insufficiently advanced.

  19. Let me predict the future by Zontar_Thing_From_Ve · · Score: 2

    It seems obvious to me exactly what is going to happen. If I'm wrong, well, good for all those who got into bitcoins.

    Sometime within about 1 year from now, someone is going to hack bitcoin. Either
    a) The goal will be simply to destroy it and render it worthless.
    or
    b) The hackers will make a lot of money before bitcoin in rendered worthless. Before anyone realizes what is going on and can stop the hackers, bitcoin will have been ruined.
    The end result in both is that bitcoin will be rendered worthless. This attack or hack will be in a way that nobody saw coming, but after the fact everyone will slap themselves in the head and think "How did we not realize that this was possible?" I am not claiming to have any idea how this will all happen. I simply predict it will happen.

    When this happens, people like me, Steve Forbes and others will say "Told you". The "true believers" (the anti-government nut jobs) will erroneously conclude that the entire idea was perfect and if they only fix the specific nature of the attack that destroyed bitcoin, then bitcoin2 will be able to start up and it will never, ever be compromised. Right.

    1. Re:Let me predict the future by timmyf2371 · · Score: 2

      Bitcoin's most obvious vulnerability is the 51% attack - where the attacker controls over 50% of the computing power of the Bitcoin network. Although there is not that much relative profit in doing such an attack, if it was ever to take place, it would certainly destroy confidence in Bitcoin and would probably render it useless.

      There are two possible candidates for such an attack:-

      1. A rouge mining pool or collection of pools decide to implement a 51% attack. The most popular Bitcoin pool (BTCGuild) currently has around 40% of the total hashing power on the Bitcoin network. The operator recognises this and has talked about raising fees as computational power increases to encourage users to move elsewhere. But as we know, not everyone is so altruistic.
      2. With production of ASIC miners ramping up, there is the potential that a rogue manufacturer or user/pool could quickly gain control of the Bitcoin network.

      I personally think this kind of attack is unlikely, as pool operators and miners (and miner manufacturers) are doing what they do for the money; if they intentionally devalue the currency, then their blank cheque evaporates. And I don't think rogue groups such as Anonymous or botnet operators would have the means to gain such a level of control; controlling a million mid-range household PCs might get you a reasonably sized profit, but they aren't going to get anywhere near 51% of the total computing power.

      --

      Backup not found: (A)bort (R)etry (P)anic