You're seeing the forest but not the trees buddy .
There has been a mass congregation to the cities ,the fabric of Australian life has changed ,there are jobs in the cities now that were never even thought of ten years ago . The demographics have altered radically ,there are fewer large families and more singles ,more gays ,more spending power amongst those who want to dwell in the inner city. They don't have the obligations their forebears had .
It can't crash unless they all start losing their jobs or the demographic trend alters ,which on present indications it can't ,it's going more the other way.
Sorry ,I'm not a property bull by any means ,I'm a share man ,but it's self evident to me that anyone calling a property crash hasn't got their eyes attuned to what's happening on the ground