David Lereah @ Peak Bubble

"If you paid your mortgage off, it means you probably did not manage your funds efficiently over the years," said David Lereah, chief economist of the National Association of Realtors and author of "Are You Missing the Real Estate Boom?" "It's as if you had 500,000 dollar bills stuffed in your mattress."

He called it "very unsophisticated." (Los Angeles Times Aug 28th, 2005)