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?
But we dont have a one world government. Every nation has his own government and own principles. One or more country can destroy bitcoin in their own country but that will only be in their country and not the whole world. The world is so big and it is impossible for bitcoin to be distroyed worldwide since the whole world is not controlled by only one government.