Should we worry that every billionaire seems highly intent on building ways to get the heck off the planet?
... Do they know something we don't?
Space penthouses.
No. We already know that the planet will undergo drastic changes in the next 100 years.
Except Musk and Branson who've been doing this before it was the cool new thing- it feels the newcomers are just doing it for legacy. Having hospitals and colleges named after you isn't special enough anymore. Space is the new frontier for ego battles.