But its not ‘real’ cash, its what the owner of it could/can raise against the collateral in today’s market. So you can’t just go and grab it. In fact, if you started grabbing the mythical wealth it would be worth less… It may even become worth nothing (or at least less than it cost to seize)… “Oh noes, the feds are taking Elon’s stock… Quick sell it all 11!!1” price crashes, Fed end up owning paper not cash.