Issue a new dollar at a one-to-one ratio. Let this dollar be issued by the US Treasury. Make it easy to exchange the old for the new at the levels normal people would do so, even high net worth normal people. Call it the US dollar which it is so as to not interrupt contracts and derivative assets denominated in US dollars. Make it increasingly difficult for one person or entity to exchange larger and larger amounts of old dollars for new. Use the Secret Service to vet the larger exchanges and to watch for mules (meaning people who haven’t used their allotment of unreviewed exchanges below a threshold who sell that allotment to money launderers or others, institutional or individual, wishing to disguise the source of the 10 billion dollars they happen have kicking around). Thereby flush out or remove the value from the largest piles and piles of ill gotten gains without even having to find them. There will still be small piles of ill gotten gains. That’s for law enforcement to address. Regain control of the quantity of dollars on Earth and thereby thrive like every civilization ever has with stable currency (or money if its made of precious metal).