Only Bitcoin values houses properly. No country, fiat, statistic, etc, etc, can ever value houses properly. So in the end it's all a fluctuation of irrelevant data.

Because it all lead to its marginal cost of production, i.e the real cost of housing, in relation to Bitcoin and with given time.

TLDR: Nobody actually knows what houses are really worth. Price discovery for houses (and everything else) is in fact broken.