Microsoft Halts Bitcoin Transactions Because It's An 'Unstable Currency' (bleepingcomputer.com)
Catalin Cimpanu, reporting for BleepingComputers: Microsoft has stopped supporting Bitcoin as a payment method for Microsoft products, Bleeping Computer has learned. A Microsoft support staffer has told us the move is temporary and cited the unstable state of the Bitcoin currency. Microsoft added support for Bitcoin in 2014, and has previously temporarily stopped supporting Bitcoin in the past.
When a currency can quickly gain or lose half it's value with no apparent reason and no apparent cause, many people won't want to take them for fear they will lose money on the deal.
There is no "-1 offended" or "-1 you don't agree with me" mod options for a reason.
It's the speculation related to the market dynamics of blockchain currencies being treated as commodities in a market that is currently causing any instability, either perceived or otherwise. That is a completely different issue than any cryptocurrency's intrinsic *technical* stability.