Trump is indeed a menace to the US and the world, indeed, but I get the feeling that Trump really does want to unwind the damage caused by the US meddling in foreign countries for the last 70 years or so. This is going to create a lot of pain in the short run, but in the long run rebalancing trade can only be positive for the rest of the world.

As far as manipulating coin prices to cover any debts is concerned, there's no way that's possible. The entire crypto market cap is just a drop in the bucket compared to the size of the US debt. You'd also have to assume that the money made by whatever government entity is performing the manipulation would actually go to repaying debt or balancing the budget, and not being sucked up by the famous Powers That Be.