So the US currently has 36.7 trillion dollars in debt source: https://www.usdebtclock.org/index.html
If they convert 4 trillion dollars to euro and actively try to devalue the dollar through a crash and the bailout they have already planned. Dropping the dollar to 10 cent they could pay off the debt with the 4 trillion by converting it back to dollars . With funds being moved into europe the euro is increasing in value so it wouldn't need to drop as low as 10 cent to fully pay off the debt. Is there anything stopping the US doing this ?