Once investors figure out that Bitcoin is the superior investment property after you already have a primary residence the excess speculation will get sucked out of real estate. This may be in the 2024 halving cycle. I say Bitcoin is superior because it's more portable, more fungible, no property tax, and the work of managing the properties doesn't scale linearly with the amount you own. Don't need to worry about bad tenants, government regulation preventing rent collection, wear & tear, list goes on.
