Honestly, I don't think that some countries would like the idea of bitcoin... They'll ban it in my opinion due to the danger of terrorism funds transfer anonymously as soon as they come to know more about bitcoin.
In some countries yes, and probably bitcoin would remain in online transactions, even if some countries ban them.. there would still be new users of it just like this days...
Yeah, bitcoin has a quality that governments don't have the power to ban it.
But still there will be a possibility, that is; if a country want to ban it then they will block their wallets in the country but still people will use VPN for its use.