The stock is selling at a p/e of 30, while the most optimistic projections of earnings growth are 15–20 percent for the next two years. - Peter Lynch

Ultimately it is not the stock market nor even the companies themselves that determine an investor's fate. It is the investor.

In fact, most great investors I know (Warren Buffett, for starters) are technophobes. They don’t own what they don’t understand, and neither do I.

If you’re considering a stock on the strength of some specific product that a company makes, the first thing to find out is: What effect will the success of the product have on the company’s bottom line?