I think The reason is simple. When government looks at bitcoins, they are incapable of tracing any person or company holding responsibility for Bitcoin.
I think because 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.
That is the reason why other crypto restrictions because crypto is a new currency, are unstable, are very fraudulent and have not reached a certain balance like some other markets such as stocks, gold.