Governments can issue regulations as they please. No doubt about it.
The promise of Bitcoin was to leave governments unable to enforce any kind of regulations using technology and decentralization.
The problem with that promise is that it is enormously expensive for consumers to run Bitcoin nodes. Therefore everyone uses third parties, there's not that many of them and there's absolutely no way for them to stay resistent to regulations.
So as I see it, there was a time when governments couldn't enforce their regulations to decentralized currency. Now they can.
What do you think? Is the Bitcoin promise broken?
I cannot find anywhere that Bitcoin promise anything. Yes it is created for p2p currency that can be send anywhere without 3rd party intrusion which is still in effect. Regulation of government does not necessary means that it can't be send the way it used to be.