Greater Fool Theory,  constantly find a greater fool to buy your property until the last one end up as greatest fool, same like those who bought oil at USD 148 during 2008.

http://en.wikipedia.org/wiki/Greater_fool_theory

In real estate the greater fool theory can drive investment under the expectation that prices will rise, or force need-based-buyers to out bid irrational or ill-informed buyers.
A need-basis can be for basic housing or for organizations fulfilling exigent commercial interests.
This phenomenon may also occur
among banks offering real estate financing.

Now properties become no.1 pyramid/Get rich scheme/pak man telo in Malaysia. ..lol