This quote was from Robert Kiyosaki (Rich Dad) from an artical on Yahoo Finance.
Where Deflation Does Its Damage
In a deflationary market, the value of your home can drop. If the value drops, the bank may call in your loan. Even if you’ve never missed a payment, and even if you’re ahead on the payment schedule, the bank can call in your loan if they feel the value of the property is lower than the loan amount.
For example, say you buy a house for $100,000 and put 20 percent down and borrow $80,000. If the market deflates and the value of your home drops to $70,000 (because everyone else is selling their homes to get out of debt), the lender may ask you to pay the $80,000 you owe immediately.
If such deflation happens, cash will become king. There will be half-price sales on BMWs, expensive restaurants will close, and people will be out of work. And anybody who caters to people with dumb money will be in trouble. As I said before, deflation is much worse than inflation.