It's like to ask what color do you prefer? Someone prefer Bitcoin as it is first crypto, have a biggest market cap, when you say crypto currency first you think at Bitcoin, others prefer ETH because it is more applicable, faster in transactions, more cheaper CPT, easier to mine (ATM) and so on. 

They ban something they cannot manage. Actually I think the bitcoin itself is not banned and no government can do this, but only the exchange tradings.

It is like on trade market - invest all into a volatile active only if the price limit have not been achieved. So, we can make another topic - have Bitcoin touched its limit?

Any Government have no control to bitcoin, and anything without control can be banned at a moment. Still in many countries it is not clarified with any law it will be more al less legal: Ubi lex non distinguit, nec nos distinguere debemus