People also always ignore the whole "Controls giant corporations" thing. You have significant leeway to direct companies you control into things you want without falling foul of regulations. Consider Musk bringing in Tesla software developers to Twitter.
Just because that power can't always be converted to cash 100% in a second doesn't mean it doesn't exist
And those assets even if they’re not all disposable at the market price can be used as collateral without liquidating them.
So I think it’s still fair to say that Musk, etc. still have the greatest personal financial leverage available to them in the world.