Even if you are convinced that house prices will fall from their present levels, then wait until you are happy with the price
I think what makes a person's home different to other investments is that he or she is buying a home rather than an asset. It's almost an asset by default, so you can't apply the same rules or logic that you would to an equity investment. If I buy a family home, what's it'll be worth in 30 years time hardly crosses my mind. If I make an equity investment, what it'll be worth in the long term is foremost in my mind. By treating your home purely as an asset, you may miss out on the important things in life.