Yes house prices can go down and have. Post 08 crash house prices from where buyers bought at the top in a few years went down as far as 70 percent. There was another one in the 80 s where they dropped too. But what didn’t drop was apartment rentals although they didn’t double or more in prices in a few years because they weren’t being bought up by these scrum bags too. I watched it happen here. The apts were being bought and tenants were being evicted for so called upgrades which was cheap and nothing much like painting then raised the prices to double or just up and raised the prices. It only froze and slowed increases post 08 but they never lowered the prices. .
What rising the prices these scum were causing increased he average price for that area even if the people weren’t doing it. That also allowed the government to get their cut by the original owners to suddenly get a tax and insurance increase.
