Speculator: All that glitters

Just because Warren Buffett has cornered 20 percent of the world's supply of silver does not necessarily mean that astute investors should jump into the crucible after him. The Hunt brothers were there before, and then the traditional metals traders changed the rules and transmuted the Hunt's silver hoard into base metal. As a sideline, the Hunts had amassed a magnificently comprehensive collection of Greek, Roman and Byzantine coins, which were eventually hawked at Sotheby's New York to cover