I can't help but to quote the full song Modern Man from Arcade Fire's album The Suburbs -- which basically was an entire album chronicling this sort of issue in San Francisco. So I wait my turn, I'm a modern man And the people behind me, they can't understand Makes me feel like Makes me feel like So I wait in line, I'm a modern man And the people behind me, they can't understand Makes me feel like Something don't fee…
I think the main reasons people want to park their money in property in expensive cities are some combination of 1. uncertainty/flight to safety 2. thinking prices will go up, perhaps due to undersupply, perhaps due to genuine value to be produced in the cities 3. for some wealthy foreign investors, an asset that's not at risk of being seized by a corrupt government.
The wealthy are certainly revealing their uncertainty. I'm not at all convinced this is worse than the time when the wealthy had absolute confidence in their grand plans for improving the lot of the unwashed masses.