In my view (not one shared by many others) the essential value of the dollar is in the tax collections of the IRS. It is these taxes which pay the interest on the Treasuries which can be reliable converted to and from dollars.
So long as the IRS remains solidly in business, Treasury interest will be paid and the dollar will have some (likely fading) value.
To extend my last post above, whereas it used to be “He who has the gold rules”, now it seems to be “He who collects the taxes rules.”