Having that much money is only possible through a mental disorder. They either have an overwhelming fear of "not having enough" or are sociopaths that don't realize/care that their amoral greed is inherently destructive. They should be hospitalized, not running companies or countries.

There are some very wealthy people that live like you imagine but they reach a wealth plateau. At some point, putting in years of conniving to multiply your massive fortune isn't worth the effort. Even a few hundred million dollars can let multiple generations live a lifestyle better than 99.9% of any human in history.