I agree with this one. Though it is hard to accept it that it may happen but there is a possibility. We know that bitcoin is decentralized and cannot be controlled by government but they will always find a way to get a hold of it or if they can't control it then eventually make a law to ban it. There is also the thing of regulating the exchanges but if it threatens their financial industry then eventually they would ban it. The good thing in where I am residing is that our country is open to using bitcoin and even have regulations and warnings about it. If it may happen that they will ban it then I would eventually sell my coins because I don't want to risk being fined or in jail because of bitcoin. Might as well find another way to earn than being in prison.