FWIW, I kno(e)w four billionaires through my work (one deceased, one I lost contact with), and their life is not at all like described here, though they could afford that and more they keep a pretty low profile and you likely have never heard of them, and likely never will. But the 'controlling interest in a company you've likely heard about' is a common factor for three of those four.
The people that throw money around as if there is no tomorrow are typically the ones that have an unhealthy urge to be recognized as wealthy, the really wealthy people are relatively quiet about it in comparison.
That may of course be a reflection of the group of people that person connected to, I can see how there are very different circles of wealthy people just as there are different circles of people that are not wealthy.
Shows how easy it is to underestimate how different lives we all live, depending on our experiences and outlook - even in the same country. Money is probably just one big parameter, but there are surely many others.
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