In fiat yeah it can go up for much longer than we can imagine, while we can only leverage our future wages so far, and theres only so many people who will get access to increasingly higher leverage, big investors can keep buying up supply

There's always some creative way of extending the runway, 100 year mortgages, group buying mortgages bla bla bla

In Bitcoin sure but will people want to trade their bitcoin and pay the taxes for a home and deal with real estates taxes and lose out on opportunity cost of bitcoin, or will we just see lending services and borrow against your BTC at x rate for real estate