Whether Bitcoin existed or not, the Dollar will end the Dollar's reign. 
Fiat currencies don't last forever. They can't. With all debt-based money, eventual failure is an integral part of the recipe. It's just how they function. Some last longer than others, but they will all approach worthless at some point.
Fiat currencies don't last forever. They can't. With all debt-based money, eventual failure is an integral part of the recipe. It's just how they function. Some last longer than others, but they will all approach worthless at some point.
And if the US Government Seizes all bitcoin of all US citizens, and then backs the US $ with it,
then your conclusions of the dollar demise are void.
I've seen you make some stupid posts before, but this one truly is special. You really must be running out of arguments if this is the straw you're clutching at. The infinitesimally small chance of this happening aside, there will never be enough bitcoins to back all the money they keep printing.