Okay, I see your point. If the AU$ is overvalued, now's the time to buy HK$ and invest there. Then, when the AU$ falls (as it likely would with a 100BP interest rate drop), you could sell down and revert to AU$ with an exchange rate profit. Fair enough. Where do I sign up again?
A trip to the place and a few weeks with agents and seeing every suburb and development you could imagine helps, as I have done in the past 2 years, and speaking to tax advisors and meeting a couple of banks.
Just as we don't buy in Syd/Melb without knowing anything about the city. Same concept.