>The USD is the dominant currency because USA is the dominant military power by an order of magnitude.
Wrong. The USD was dominant currency because USA was the only major country untouched by WW2. Every other major country had it's infrastructure bombed and shattered. It is the dominant currency today because everyone is lazy to change the status quo as long it is working.
If USA upsets the status quo it will be replaced. Just ask your cousins across the Atlantic how that works.
P.S. your armed superiority is a joke. You were unable to defeat a bunch of untrained rice farmers. Your only armed victories in the last 50 years were against civilian militias. Any serious war with the standing armies of Russia, China or India will get you creamed. The only reason you are tolerated is because no one wants to be the one to start a war.