At any moment, the president can say, "either do XYZ or I order the Reserve to be sold off immediately", which will crash the price of Bitcoin. Or the other way around, "accept total control of Bitcoin by the US government, and US taxpayers will drive Bitcoin to $120k"*.
(And I suspect most of the people on this thread calling for the Reserve would gladly accept this bargain).
If we take into account that the majority is interested in BTC only for the reason of profiting as much as possible in the shortest possible time, then all the consequences of the decisions made at some point are not really important for them. The only thing that matters is that these decisions push the price as high as possible and that they manage to sell when that happens.
People don't understand how dangerous such ideas actually are, and I only hope that they will not be realized, because the idea of what Bitcoin should represent will be lost forever.