Comment Re:Killing two birds with one stone? (Score 1) 408
If there aren't, and the US government is persistent enough, wouldn't they be able to effectively "lock out" everyone else from getting money out of the system by basically draining the exchanges dry?
I don't think it works that way. Usually it is not the exchange's task to convert bitcoin to fiat: the exchange is just a middleman that (optimally) guarantees that a transaction between two parties will go smoothly. This is mainly done by having an online 'balance' of bitcoin, same as having a balance on a bank account. The exchange company will allow to 'withdraw' your remainder if you wish, by sending you bitcoin to an address of your liking: but if you want money for bitcoin, this will be wired (or otherwise transfered) to your *bank* account, from the buyer, through the exchange.
So there is always money for bitcoin as long as there are buyers for it.