Personally I think the USG actually allowed Bitcoin to grow for their own selfish reasons and the moment Bitcoin becomes a threat, they will put Bitcoin in its place.
Such a politician-like thing to say. When they fail to do something they wanted to and things go the other way they didn't want, they immediately change position and say "we wanted that other thing to happen"

The thing about Peer to Peer networks is that nobody can do anything to them. When there is monetary incentive involved and the said network grows globally then it also becomes impossible for anyone to do anything to that network.