Jim Cramer: Yes, absolutely. The guys on Wall Street may have fat expense accounts and direct contact with CEOs but individual investors should not discount their own observations in the world, specifically what is going on in their own line of work. For example, small homebuilders and plumbers probably saw the boom in copper prices before the Wall Street operators, and I bet a sales associate at an Apple (AAPL:Nasdaq) store knows more about how Apple computers are selling than an analyst with a seven-figure income. In the 1980s, I made big money on Reebok, because every sneaker salesman I could find told me they were selling Reebok sneakers as fast as they could stock them, information most guys on Wall Street didn't have.