[Vindicis]

That's extremely difficult to explain for many, many reasons.

Ignoring a great deal, basically that debt either needs to be paid off when it matures or rolled over into bonds e.g. issuing debt to receive cash that can be used in paying off those bonds.

Now, how that will affect the USD is where things get complicated. Will a higher interest rate be needed on new financing to attract investors? Will the Treasury have cash on hand to cover paying off all of those?

Assume they goto the market to refinance all of those bonds and have to pay a higher interest rate: this means tax payers have to pay more taxes, and get less services because more of their money is going to interest payments on this debt. Or perhaps they can only find investors willing to buy 8 trillion in new bonds, then that means the budget needs to cut out 1 trillion for that year in services, just to give a couple ways how this could play out.

Everyone has their own idea of what will happen and will speculate accordingly. Some might think interest rates will explode, of the Fed might cut. Maybe Foreign flows will not be reinvested and affect the USD accordingly. Etc, etc, etc...