[onion2k]

His wealth is locked up in some form which though is valued in USD won't translate 1-1 to other forms of wealth.

You should also consider that Bezos can access his wealth in more ways than simply selling his stock. It can be used as security against debt for example. Should Bezos decide he wanted to he could borrow many billions of dollars secured against some of his Amazon stock today (assuming his contracts with Amazon don't preclude doing that). Bezos could also donate stock to a charitable trust, which could then sell it with much less market disruption. Or he could use dozens of other financial mechanisms available for accessing his wealth.