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.
Thats one of the advantages of bitcoin. Bitcoin after all became popular to create untraceable transactions. It was used frequently in the dark web to create transactions that the government wont be able to track.