If china pulls out of backing the dollar and dumps them by trading them off, the value of the dollar will drop to the level of zero overnight and the world economy will fail. But the chinese are winning the game right now and would lose billions if the dollar failed and who wants to quit playing while they are winning? Between china and the mideast america has lost the war without a shot being fired, they just don't know how to move in and take over but maybe as long as we are supporting them they don't want to.