Figure out how many ounces of gold you could buy if you sold your real estate today. (Gold closed around $550/oz today)
Gold will be at least $1650/oz before 2010 which means the value of your real estate will decline by a factor of 3 compared to gold.
Another way of stating this is that your million dollar property today will be worth $333K before 2010 if you price it in real terms (gold and silver are the only real money).
Going from $1 mil to $333k is a 66% drop but it might take 4 years instead of 3.
My points above only address debasement of the US fiat dollar (the price of gold is a measure of this debasement as it has been throughout history). There will also be a decline of house prices in nominal terms so the end result will be even worse.
It blows my mind that anyone is buying real estate these days!!!