Anything that they are doing now has only short term effects, say one to two years. It would revert to long term trends. Going back to levels five, ten years ago, forget it. So the moment the correction is about fully done, move in and buy. Otherwise, you would have missed the boat.
Same with cars COE. Those so-called experts who predict the COE will collapse in 2014 because of quotas from scrapped cars are not really experts because they fail to consider the increase in demand from those who sell their cars. So move in, when there is a freak result because of the economy or other combination of factors.
HDB prices wouldn't take a dive unless Dr Chee takes over as Govt. Drastic drop in HDB prices will affect the govt budget. Even a change from purchase to rental will also affect the budget. So don't expect a drastic drop.
You have to wait several years to see any drop and coupled with the upward trend of inflation, you may not actually see a drop at all but just a stagnation in price and I am talking about either a reversal of the FT policy or the Govt dismantling the land pricing formula not to earn on the land, but to avoid revenue issues and impact on the loan service of existing home owners, spread it over several number of years.
On the other hand if they continue as it is now, expect a continuous upward trend with minor corrections now and then due to "cooling" measures. Except for speculation and foreign investments, "cooling" measures only delay demand.