Right now we're mid-game with btc. It appears that the implicit strategy by the authorities is to treat it as a functioning currency. Fine then; that is good for btc's long-term success. It also implies that the tax-man is coming. btc is not going to live as wildcat currency used by the fringe, untaxed and destroying economic supremacy (That is to say, I disagree with the idea that btc will destroy the economic system that some people favor).

Also, the blockchain is 100% public. So if you can tie a btc address to a real person (perhaps via tax returns requiring you to declare your virtual currency addresses), then the entire pseudo-nymousness of btc goes out the door.

Things to think about.