This is something which I've beleived for awhile, which is the prospect that if big governments and banks worked heavily together they'd be able to remove Bitcoin from the face of the earth. They wouldn't ban it, as that would be a tough thing to swallow for the American people as they wouldn't see a good reason to do that ( at least in my mind here) But they could just go ahead and regulate Bitcoin into oblivion, making it hard for Bitcoin businesses (buying and selling, trading, etc) to operate within their countries, or be subject to insane taxes, KYC AML and such.
Do you think Governments could kill Bitcoin?
No one can easilg demolish bitcoin. Because bitcoin is decentralized and no one knows who are the mastermind or the real managaer of this whole digital money. Maybe the only thing that government can do in this kind of matter is giving some tax to those bounty hunters and holders.