Worst case is you lost a lot of money, because low-interest mortgages push up real estate prices and have been doing so for a while. If the bubble pops, you wil

Worst case is you lost a lot of money, because low-interest mortgages push up real estate prices and have been doing so for a while. If the bubble pops, you will still be paying 100% of the money for something that's worth maybe only 50%.