". They must go up always and forever. The entire world economy revolves around the appreciation of homes in highly developed countries like the US,"

Sorry, that makes no sense. It's a bold, assertive statement that will render the whole situation hopeless.

And the economy doesn't really depend on housing, it depends on people doing productive things and innovating.

If a lot of people choose to speculate on housing, that's their problem when it stops going up or goes down, just like any speculative asset.