Bitcoin is designed to be censorship resistant, peer-to-peer payment system designed to remove the control by centralized institutions like banks . When bitcoin eventually achieve mass adoption, it will not really be much of an issue if some Governments place a ban on it within their countries.
But if they do not do it then people are going to keep adopting cryptocurrencies and the problem is going to become larger and larger, and if they try to regulate the market people are just going to ignore the regulations because they do not have to obey them because the government doesn't even know who they are.