IIRC, Facebook's cash is more like $81-82 billion.
This common argument to not take market cap valuations seriously doesn't hold.
True, Meta as an entire entity is not liquid. A forced sale in entirety would produce a massive reduction in compensation. But that is a highly unlikely and contingent reduction.
It is also true that if you have Meta's equivalent in cash, the value of the cash is likely to drop, while the value of Meta likely to grow, over any appreciable time. In that sense, $X cash is worth much "less" than the $X market cap.
These seeming contradictions are the result of different practical tradeoffs in structures of wealth. Not because market caps reflect misleading or overstated accounting.
There's some interesting exceptions, like how Musk has managed to sell Tesla shares totalling more or less as much as the business itself has made in total lifetime revenue; but even then, Musk's theoretical net worth is very different from how much he could get if he was forced to sell all his shares suddenly.
Owner-CEOs like Musk and Zuckerberg get all the effects of such randomness, but the only examples I can think of such people getting into billion-dollar legal troubles tend to be examples which go on to sink their companies completely, so I'm not sure what impact a fine of "merely" 10% of cash reserves would do to investor confidence as expressed in share price. And this is not the only legal case Meta's facing right now.
I sincerely doubt that Meta's share price would crash as a result of Zuckerberg getting an expensive judgement.
