Professional property managers can scale the cost of ownership in a way individual owners can’t.
Besides that speculators can also withhold supply, artificially inflating prices. 2008 occurred due to speculation, independent of NIMBY regulation.
As for crypto, housing can actually be more profitable than crypto since investors see rentier income not just speculative appreciation.
Ultimately, this isn't just a supply-and-demand problem in an idealized market. It's a resource allocation issue where investors with significant capital can hoard housing, driving up costs, while many people struggle with homelessness. Simply greasing the market with deregulation won't solve this fundamental imbalance.