" In stage four, once again they’re crowded around me—but this time it’s to tell me what stocks I should buy. Even the dentist has three or four tips, and in the next few days I look up his recommendations in the newspaper and they’ve all gone up. When the neighbors tell me what to buy and then I wish I had taken their advice, it’s a sure sign that the market has reached a top and is due for a tumble. "

― Peter Lynch , One Up On Wall Street: How to Use What You Already Know to Make Money in the Market