I do not think that government can ban bitcoin. Bitcoin is a decentralized crypto currency and there is no such government can take hold on it or control it. More governments have regulating bitcoin and that helps their economy as well. Accepting bitcoin is like accepting the opportunity to have a great profit. Great profit is good economic status.
Banning in terms of their usage, we already see how Chinas government bans exchanges and ICO, bitcoin may still be say that still exist in their country but it will be hard for crypto investors to fully used the potential of their crypto as well Bitcoin if there are no exchanges present on them and they can't even allow ICO investors to join on any since there are some permitting that needs to be done in selection of countries that can participate.