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Bitcoin Exchange Ordered To Give IRS Years of Data On Millions of Users (gizmodo.com)
Last month, instead of asking for data relating to specific individuals suspected of a crime, the Internal Revenue Service (IRS) demanded America's largest Bitcoin service, Coinbase, to provide the identities of all of the firm's U.S. customers who made transactions over a three year period because there is a chance they are avoiding paying taxes on their bitcoin reserves. On Wednesday, a federal judge authorized a summons requiring Coinbase to provide the IRS with those records. Gizmodo reports: Covering the identities and transaction histories of millions of customers, the request is believed to be the largest single attempt to identify tax evaders using virtual currency to date. As a so-called "John Doe" summons, the document targets a particular group or class of taxpayers -- rather than individuals -- the agency has a "reasonable basis" to believe may have broken the law. According to The New York Times, the IRS argued that two cases of tax evasion involving Coinbase combined with Bitcoin's "relatively high level of anonymity" serve as that basis. "There is no allegation in this suit that Coinbase has engaged in any wrongdoing in connection with its virtual currency exchange business," said the Justice Department on Wednesday. "Rather, the IRS uses John Doe summonses to obtain information about possible violations of internal revenue laws by individuals whose identities are unknown." In a statement, Coinbase vowed to fight the summons, which the company's head counsel has previously characterized as a "every, very broad" fishing expedition.
Because Bitcoin is not a currency according to previous legal rulings and the IRS seems to be treating it however would advantage them in any given instance. I would assume that holding on to bitcoin then qualifies for capital gains if sold later at a profit.
The premise of your question is flawed. BitCoin transactions are NOT anonymous, they are actually tracked *forever* in the block chains which are public records. What's supposed to protect you is that your wallet (a set of Crypto Keys actually) is used to identify parties in a transaction. Where it may not be easy to match the wallet to the person (or entity) making the transaction, but once you do, you can find EVERY transaction made by that wallet from public information.
Those trading BitCoin (which is something impossible to physically trade) must do so electronically, which means you have to use some kind of exchange at some point in order to obtain something of value for your BitCoin (i.e. trade it for something else). It's these conversion transactions where the anonymous nature of those Coins really isn't so safe and one's identity can be revealed. Once you are identified as the owner of a wallet, then everything you've done falls out of the public record in the block chains.