Just thinking aloud from a buyer's perspective...
One factor now is the SSD which means if you want to buy you need to hold for four years. Thus the issue is not just whether there will be a drop now... but what happens if you buy now and can only cash out after four years.
e.g. for a 2 m property:
A expects price to drop 10% or 200k. A waits and doesn't buy until it drops to 1.8m.
B expects price to stay flat. B buys now and rents it out for four years thus making 200k in rental (conservative assumption).
If A is wrong about price dropping 10%, then A doesn't buy in the next four years and loses 200k in rental income, and takes the risk that after four years the down-cycle is over and price shoots up.
If B is wrong about price staying flat, then B takes the risk over four years that prices crash >10%. However as long as prices doesn't crash >10%, B is still better off buying as his rental in four years covers any potential loss, and perhaps, by the time he wants to sell, the up-cycle begins.
Admittedly, this is a very simplistic example - but considering the above, do you think buyers are more desperate to buy, or sellers are more desperate to sell?