I've been using a moniker containing two Xs for over two decades. Speaking on behalf of my early-20s self, how fucking edgy do you believe yourself to be as one of the world's richest persons embracing a single letter as the epitome of logos to represent your umbrella corporation? Hire a branding team, you pathetically dull gen-x neckbeard edgelord manchild.
Seriously, the '90s called a they want their X back.
He doesn't need a branding team, he's too smart for that. That's why he is also sourcing a logo from the Twitter community. Because billionaires geniuses don't pay for anything.