I think the reason why other ban crypto because crypto is a new currency, unstable, highly fraudulent and has not reached a certain balance like some other markets such as stock, gold .... Governments have not recognized crypto to protect people against scam risks. Once crypto is more transparent and stable, I think it will be recognized and become more popular.
It has a point. It is probably the main reason, the government worries abouth the cryptocurrency market itself. But then it is not only the problem but also the government sees the cryptocurrency as a tool in doing illegal things. Ae should clear that cryptocurrency is not for bad things but rather it is a tool to boost the economy.