Not strictly true I think, but traded the money he made from Paypal into Tesla, then used that to backstop family losses. So when Tesla bought Solarcity off Elon's cousins and brother. That seemed to pay well for the Muskovites, less well for ordinary shareholders.
He had the money to start his first X company, which ultimately became PayPal because he didn't have to worry about silly things like rent or other basic necessities. If it had bombed, he had family wealth to fall back on to keep him housed and fed. Though, yes, when Solar City was bought out, it was a great deal for the people who owned large amounts of stock in Solar City, which was mostly Xitler and his brother... less so for the Tesla shareholders. Why they didn't demand some house cleaning on the board and in the C-Suite after that, never mind the SEC investigating it for potential insider trading and self-dealing, I'll never know.
Apparently he's also demanding a new executive compensation package and more stock to mebbe keep him interested. Mebbe Tesla's investors will say 'NO'. Given how leveraged Musk's portfolio must be, having someone else driving Tesla might end up being good for Elon's security though.
Compensation for what? He spends most of his day trolling on Xitter. When he isn't doing that, he seems to be sexually harassing*+^ female employees at his various business ventures to be impregnated via IVF after he jacks it into a cup. The amount of time he seems to spend actually doing what might be considered work appears to get smaller every day. He may be sitting in a chair somewhere at a Tesla or SpaceX office, but if he's just on his phone being a Xitter whore, he's not exactly working. Any one of us would easily get shitcanned if that's all we did every day. Even in the UK/EU where you have much stronger labor laws, you're not going to find a sympathetic tribunal judge I would imagine. Unless your job is to be a Xitter whore, which is probably not a position at any reputable company anywhere in the world.
At any other company, where the board wasn't literally made up of family members and other sycophants, Xitler would have been out on his ass ages ago. The Solar City deal probably would have been more than enough reason to force him out, and there were probably examples before that. Then there's the "funding secured" xcretion, the embezzlement from having Tesla employees work on his privately owned company Xitter. Or just the fact that there's no way he could really be spending that much time on Tesla related matters if he's also involved in SpaceX, Neuralink, Boring, Xitter, and that AI venture I forget the name of (and let's face it, it doesn't really matter). That's without ample evidence that he spends inordinate amounts of time during the day being a Xitter whore.
* In the US at least, under the law, this would be sexual harassment even if the employee willingly agrees because of the power disparity in their positions. It is essentially a quid pro quo arrangement because he could fire the employee in retaliation if they refused. I can't say for sure, but my guess is it would be similar in Blighty and the EU.
+ How the fuck does a conversation like this even come up as part of a normal professional working environment? Seriously. Seriously, seriously. "Hey Barbra! You ever thought about having my kid if I jack it into a cup and then pay for you to have IVF?"
^ Who the hell would want to ensure that Xitler is forever in your life by having a kid with him? The nice thing about it being a strictly professional relationship is you can always quit and find a new job. But if you have a kid with him, however it was conceived, you're stuck with him until the end of time.