For me it is pretty unlikely to have Bitcoin banned in most of the countries. If several governments decide to ban the use/ownership/... of bitcoin (they can not ban Bitcoin as "technology")
we will have to follow their laws and are pretty helpless. Governments already showed us they "do whatever they want". It's hard to look ahead into the future.
But i still believe there are far bigger problems governments are/should focusing on. And Bitcoin will stay Bitcoin.