There is one possible exception to this. If the value of the dollar were to take a sudden plunge, then the value of the debts held by Japan and China would go with it. They could panic and start unloading them before it got worse. That would likely accelerate the plunge. Japan and China have many reasons why they would not like to see a scenario such as that and thus they continue to support the status of the dollar. Russia, however, does not have a vested interest in the value of the dollar. As their reserves from the energy market continue to grow, they acquire the power to precipitate such mischief.