Re: If the powerful governments wanted to, do you think they could stop Bitcoin?
Well, they can buy down 21 million BTC and keep all of them to themselves, essentially 'killing' Bitcoin. 
On a serious note, no, I feel that it is difficult for them to do so. Even if countries like China tries to ban Bitcoin in their own country, they cant exactly do so to the whole world, and there will always be a use for Bitcoin somewhere else.
Bitcoin is still gaining popularity, and its community is growing, so unless all the governments team up and say NO to BTC, it would not happen (I hope).
Citizens > Government, and we need to believe this as well.
On a serious note, no, I feel that it is difficult for them to do so. Even if countries like China tries to ban Bitcoin in their own country, they cant exactly do so to the whole world, and there will always be a use for Bitcoin somewhere else. Bitcoin is still gaining popularity, and its community is growing, so unless all the governments team up and say NO to BTC, it would not happen (I hope).
Citizens > Government, and we need to believe this as well.