This money never existed.
It would be an illusion to value Mark Zuckerberg’s holding of 475 million share of Facebook, or Jeff Bezos 79 million shares of Amazon, at the ‘market price’. Everyone knows they can’t sell their stock at the ‘market price’, for two very good reasons: (a) there is not enough liquidity in the market to buy their shares, and (b) their selling would indicate a lack of confidence in the company that would cause the price to plummet.
You just described the entire economy/banking system in relation to debt/IOUs, currency, paying off the debt, the fairy tale called “the debt ceiling” and a balanced budget. We are letting it all ride on paper. Interesting times.