I have been reading in several places that there is a theory put forward last year by Trump's chief economic adviser, Stephen Miran, which explains the end game. The proposal has been called the Mar-a-Lago Accord. I don't pretend to fully understand it. A snippet from Wikipedia is below. It seems to be about using tariffs to force other countries to agree to devalue the dollar. And also to restructure their holdings of US debt, so that the debt becomes repayable at a much later date. Apparently, this is to compensate the USA for all the good they do in the world.