The thing about the concept of a very rich man ‘losing’ $200bn is that if this sum can be ‘lost’ rather than spent, transferred, or stolen, it really calls into question its existence in the first place, and from there you start to wonder about the reality of large sums of money at all.

That is one of the qualities of money, that small amounts are extremely tangible (that $20 in your wallet, those coins in the tray with your keys), but the larger the quantity the more intangible and subject to weird philosophical ideas it is