You can not particularly worry about the economy of the United States of America. Their debt is measured in dollars that they themselves draw. Is that what America is a big problem to hold inflation to pay off the debts?
The Soviet Union was not destroyed by war or military action.
The Soviet Union was destroyed by outstanding debt and economic mismanagement.
Rome also was destroyed by debt, expensive foreign wars and similar problems.
There are lessons in the history of these things americans could learn from.
Or they could choose not to learn and have history repeat itself.