The governments can't control Bitcoin because it is decentralized. It wasn't made in favour of a centralized system where one person or authority can have full power and control over its transaction. The farthest the governments can go is to impose regulations on Bitcoin transactions especially on the exchange sites.
After ten years of trying governments cannot impose their will to Bitcoin community, some countries are still Cryptocurrency on their citizen but it's a futile effort and will not last, by regulating the exchange they can still make money and they have to realize that fiat and Cryptocurrency can co-exist without harming one another.