For the sake of argument, let's suppose that your theory is correct.
Let me ask you this: when other countries stop buying our debt and it all collapses, do you think that the US will voluntarily turn over that collateral?
Morally, that would be the right thing for a borrower to do, but do you think that we would?
What if the plan was never to pay it back at all, and just do an economic reset to the gold standard after the party is over?
If you search the net, there is a pretty good white paper you can find written by Alan Greenspan called “Gold and Economic Freedom” in 1966. He outlines very well what the deal is.
Trust me, “they” are not going to return to gold money, or a “gold standard”. Zero chance. They have done everything in their power to get rid of it, that was the whole point.