The flip side is obvious to me as well. Houses that were purchased last year on the coast may fall 50% overnight. There are only low wage jobs on the coast. The entire coast has signs warning of 'Dangerous Tsunami Waves.' There are rumors all time time about quakes off the coast. Many of those house have been built right on or very near the beach. One 6.5 and millions in real estate could be washed away.
My stuff in Tigard/Cedar Hills hasn't doubled. It has gone maybe 30%-40% since 2000. I guess I picked the wrong zip codes!