me_irl

There was a great video years ago that detailed what would happen if house prices were to rise, fall, or stay stagnant.

You're right, if they were to crash, we'd all be a lot poorer, but there would also be a lot of (still) cash-rich people that would happily buy up all the cheap stock, and we'd be in an even worse position than before. We'd build more houses, but we'd ultimately create new billionaires, and given the low quality of some new builds, probably a two-timer system of ownership where the poors get the new houses on flood lands/with dodgy cladding, and the rich live in good builds.

The best thing to happen overall is a price cap per-area, dropping by a percent every year or two, with subsidies on sustainable renting (low rent fees, buildings being up to code, etc). The landlords that use their property as investments will bail right away, renters will see the market switch to their favour, and through legislation you could probably push rent-to-sell options for those that maintain homes and want to release over several years.

More homes need to be built, but that also means more infrastructure, and building all of this without selling those houses to the highest bidder. That all takes time, at a time where there are a lot of cash-rich people that would love more investment.