Warren Buffett, the famed Oracle of Omaha and longtime leader of Berkshire Hathaway Inc. NYSE: BRK.B, famously advises investors to "be fearful when others are greedy." It's easy to become swept up in investor excitement about a company, but trying to time the market is notoriously risky. Sometimes, the smartest—and safest—move is to sell shares of a company that seems to be over-hyped. Incidentally, there is no shortage of stocks with a great deal of hype. These three companies offer investors reason for p ...