So now you're tied up to Trump even more than before. Because you either traded your goods for US investments, or just pieces of paper that only continue to be worth something insofar as the US doesn't bungle their economic and geopolitical policies. Because those are the primary alternatives to settling the trade by getting goods/services back.
Why wouldn't you want to cash out and actually get stuff back from the US for the stuff you make for them, if you think the US is headed south? It's not like you're exporting to the US as a charity.