These countries who ban bitcoin didn't understand the whole capabilities of it. Most probably their intentions was not good and commendable for their allies, considering the fact that bitcoin was a decentralized asset. Fiat economy is really different with unregulated currency and example of that bitcoin and all crypto coins that's separated from Government control.
First of all, Bitcoin can't be "banned". Those countries which claims to do do are ignorant of this fact. Bitcoin comprises of a bunch of codes and it does not exist in the physical form. The regimes can ban the conversion of cryptocurrency to fiat, because it causes a link between a real identity and the cryptocurrency wallet. Apart from this, they can't do much and that is exactly the reasons why countries with more intelligent individuals in the government looks to legalize and regulate the cryptocurrency market rather than imposing a blanket ban.