Not to my knowledge, or at least not a commonly adopted standard. Anyone got any ideas?

It's used in stock markets and no one seems to question it but those markets are far less warped, much steadier and only adults are allowed to play. Unlike crypto there's no way of creating a market from nothing and driving it yourself but you can do that a million times a day in cryptoland.

Ultimately though the same thing applies to everything. No way could you sell all the gold in the world and get 7 trillion dollars. The price would collapse until you were giving it away. Jeff Bezos couldn't realise his net worth by selling all of his Amazon stock. There wouldn't be enough buyers at the price it's currently valued at. There's a finite amount of buyers at any price.