Such market manipulation may not be beneficial for the majority of them though considering that in the scenario when the US government is carrying out market manipulation they'd want to make profit which means they have to pump and then dump on people to make money. Those people getting dumped on have to be the majority of traders and they have to lose money for the US government to make a profit...
It's obvious that they have a plan and if you look at the person that is bring this to the picture is a business person and he will do everything possible to make things better than when it was that is one of the primary functions of the president and trump seems to have picked serious intrest in bitcoin so there is no way that he would not want to make this happen, just that the market manipulation they will want to will only be manipulated to there own favour.
And if that is the case other traders will have to be behind and they won't have a choice than to change strategy because of one of drags that bitcoin comes with is that it's to dependent on news and statements and this are part of what they will use, experts know how bitcoin works so they will use it against it. And couple with the fact that they saw how El Salvador made profit, they will want to use that as an example for them self so let's wait till trump is fully signed in and see what is installed for bitcoin.