Yes, however, what if governments ban it? If copamnies are forbidden to sale with Bitcoin, very few things will be able to be bought with it (only illegal). Don't you think this can drop price? You see what is going on in China already...
Well movie/music file sharing is illegal and look how successful they've been at stopping that. I don't see how they could totally ban bitcoin without introducing a load of new laws and legislation which in itself would create another huge global privacy debate. Bitcoin has been adopted by the people for the people. That is a scary thought for governments and the puppet masters behind the scenes.
I know they can not stop it, what I meant when I said this was, that they can restrict companies for using it as a payment methond which can be later put in accountancy and invoices...