If you were right, would not the US dollar then lose value against other currencies? The opposite is the case. The USD almost wins against all currencies in the world, including the Chinese Yuan and the Euro. It may be that there are many dumpers, but there must be more buyers.
Apparently you haven't heard of P&D/FUD schemes at the international level.
Almost the same as what we experience in this space and much more sophisticated with more money/influence, just at the stock market level and instead of minutes/hours it is in days/weeks/months.
It will most likely happen, do your research and stop watching so much propaganda on your TV.