[afiori]

That is not the amount of money Bezos has, that is the estimated selling price of the stuff he owns. He could use it as money (by paying in fraction of shares) but a significant part of the value relies on the fact that he is not currently selling (a substantial part) of his wealth.

Similarly for Musk, it is easy to imagine how quickly Tesla value would drop if Musk where to tweet "I will now sell all of my shares" (he received a formal complaint because he said something that was vaguely close to it)

[Pompidou]

Ok thank you for your comment, I will go deeply in your point of view later.