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.
That's the key there, "if government could have, they would have already" and people do not realize that unfortunately. Bitcoin could be regulated, there are nations that ban bitcoin all together, but it can't be controlled, it can't be changed, if any nation could have done that, they would have already. You know what is the funny part about it?
If you could technically find a way to take control of all bitcoins, literally every single one, one government having 21 million bitcoins (even though it is impossible) you would still have people dumping bitcoin to government, not caring about it, and start making ethereum the first one, if government gets their hand on ethereum, they would move to bnb, and then to ada, to dot, to xrp, to anything really, the more governments try, the more we will move, there are thousands of crypto, it will never be fully hijacked, no way.