HOW A FINANCIAL PROFESSIONAL lost his house. “At moments during our house hunt, I felt in my gut that something wasn’t right. We’d go to open houses for $400,000 homes and see lines of couples in their late 20s — younger than we were — waiting to get inside. I kept wondering where all the money was coming from. How did all these people make so much? But prices just kept rising, and when people kept buying, that made it seem safer. I knew from my work as a financial adviser that following the crowd could be costly. But like everyone else, I felt safer in a crowd.”