If your character is about chilling and hanging out it's unlikely to be one a billionaire.

Most people getting into that group donthat by focussing their time on making money. This usually requires quite some dedication, which is a character trait you can't simply replace for going to the beach.

There are exceptions, but it's rare. And then there are the ones who got spoiled as a kid and were lucky with some decisions, like making some good real estate deals in Manhatten or finding the right partners to build some online payment service, who never learned about responsibility.