Any investment that has become a topic of widespread conversation is likely to be especially hazardous to your wealth. It was true of gold in the early 1980s and Japanese real estate and stocks in the late 1980s. It was true of Internet-related stocks in the late 1990s and early 2000 and condominiums in California, Nevada, and Florida in the first decade of the 2000s. Invariably, the hottest stocks or funds in one period are the worst performers in the next.