One think to think about, in a lot of areas where only luxury condos are being built, there tend to be pretty limited numbers of condos being built. If you are a developer and you know you will only be allowed to build 50 units, you are going to build the most expensive units you can so you can maximize your gross profit even if the marginal profit rate isn't as good. If you were allowed to build 1000 units, you might choose to build affordable housing that has a better marginal profit since the larger number of units allows you to have a higher gross profit.
At the same time, if you own an lot full of RVs and mobile mobile homes in a rich suburb, you might end up running the numbers and deciding to throw all those people out, and put up some luxury condos, because you can make a lot more money per square foot.
There was a movie while ago where the rich people lived in space in beautiful habitats, had technology that could heal anybody while the rest had to labor on Earth under terrible conditions. Don't remember the name but maybe the move isn't that fictitious.
https://globalperipheries.wordpress.com/2011/06/30/the-favel...
But a version of this is present in America too. With areas without drinkable water, and areas w/o even a working sanitation system.
Elysium is the film.
Of course, he could just copy Petey Thiel and the rest of wretch and move to New Zealand.
https://www.theguardian.com/technology/2017/jan/29/silicon-v...
Until ironically, the wealthy simply leave (because who wants to stay in an a dangerous unstable place, when you can afford to leave), and let place that they set on fire burn to the ground, click their tongues and say, "Who knew this would happen?"
To think of it another way, no one puts all bets on a single investment. You diversify. That's what spreading the wealth does. It diversifies opportunity.