The only thing sustaining the dollar is the fact it’s the reserve currency.
The day that ends the dollar collapses.
Running the presses to add 10 trillion to the national debt moves that day much closer.
Sure, we live in a world where your money is nothing but a number printed on a piece of paper called a bank statement.
The dollar is the worlds reserve currency simply because the world believes we are a safe haven for their assets in times of uncertainty or danger.
The dollar will collapse only when the rest of the world (or enough of it) loses faith and when that happens the entire world economy will crater.