Image sanitization. Why? Maybe political aspirations or deprecating old opinions.
Honestly, who wants to be a billionaire at this point? Even if you promise to give away 99% of your money everyone still hates you.
The annoying thing with most billionaires is not that they have and spend a lot of money, but that they try to force their values onto the rest of us via lobbying, "charity" and other actions designed to leave a legacy. Newsflash: if you don't try to subversively manipulate the world with your gazillions of money as enabling tool, you don't need to redeem yourself by giving 99% of it away.
Not that giving it away is a bad idea, because dynasties suck.