I think is number one already, anyway if the government can hijack Bitcoin then they've already done it because they won't let any currency runs without them holding it or any control over it.
Government can ban or take charges on some exchanges but it would not enough to manipulate Bitcoin because there are many ways to transact with everyone like peer-to-peer. They can interfere with transactions though but it would take a lot of effort to do so like terminating internet access which is impossible to pull off. Besides, there's been a lot of institutions and countries who already accept it so it would be a huge consequences if they try to hijack it.