I really don't think China and other countries will abandon the dollar anytime soon. If they wanted USD inflation, they could just sell all the U.S. treasury securities they hold. The entire reason they buy all these securities is to slow CNY deflation relative to USD. Countries with high trade surpluses with the U.S. would have the most to lose on USD inflation.
They don't sell bonds only because there is no use for all these money. You literally cannot buy anything with it. Free market is an illusion.
And when whole world monetary system goes down - those wins who have real manufacturing facilities. Read China.