If I were a billionaire I'd buy a P-liner, a blimp, a ski lodge and an apartment in a couple of cities I like and you'd never hear from me online. I'd probably still be a billionaire, because that's how wealth works. Or if the money doesn't obliterate my conscience I guess I'd give a bunch of money to zapatistas and do a left-wing Murdoch empire and abolish homelessness or something.
Either way I wouldn't be spending my one divine life posting on ~~twitter~~ ~~x~~ any social media.

Edit: You've got to be a very special kinda fucked up to not immediately check out once you become a billionaire. Think of how many of them there are, and how few of them we hear from or of?
I think Zuckerberg kinda had this realisation when he was amping up to run for president. "Wait I'm already a billionaire, why am I doing this shit? I want to live in a corporate VR hellscape where I am god, I don't give a shit about America! I'm gonna go do my weird waveboard thing, grill my meats and work on a worse version of 2nd life!"
George Lucas is the same. He lives on a ranch where he makes movies no one sees and once in a while he pops in to say shit like "Oh yeah the genre of music the cantina band played was called Jizz by the way."