I think the only reason is that banks worry about their business loses. And because they sponsorship politicians, they ask them to help keep money transferring business in their hands as much as possible.
I think the Government has not recognized crypto to protect people from the risk of a scam. After crypto is more transparent and stable, I think it will be recognized and become more popular. I think the reason why the other ban is crypto because crypto is a new currency, is unstable, is very fraudulent and has not reached a certain balance like some other markets such as stocks, gold.