Why does everyone talk to say 'there won't be a crash'?

It's all to do with talking a good game and wishful thinking. You'll find that anyone that says there won't be a crash will have a vested interest in house prices not crashing. Most people who have bought a house and seen the value of it rise astronomically give themselves a pat on the back saying that they were wise to buy when they did.

They have also probably taken out equity on their new found paper wealth and used it to go on that special holiday, splash out on a new car or add a conservatory/bathroom/kitchen/extension so they feel 'wealthy'.

This 'wealth' is only on paper though. It's a paper profit. If anyone spouts on and on about how much their property has gone up then ask them what it actually means to them. Here are a few good questions for those dinner party bores: