Not to mention most americans' retirement is tied to their homes\ equity and their 401k/stocks. So it is political suicide for the government to let either drop in value for an extended period of time. Therefore, over the long term, house prices and stock prices will likely go up because politicians want to be reelected.
The only caveat is that eventually, we will reach out "limit" ( demographically, economically, etc ) and then housing/stock prices will drop and stay down for decades/maybe forever. Japan hit their limit in the early 90s and their housing prices and the nikkei today is a fraction of what it was back then.
https://tradingeconomics.com/japan/stock-market
If the check the 50Y chart, you'll see that the nikkei was at 37000 in the early 90s and is now at 20000. 30 years in and still nearly 50% down.