The biotech industry is notorious for its pop-and-drop nature, but it also offers opportunities for risk-tolerant investors. For instance, these three companies' stock prices have tumbled, and one could be worth buying.

In the following slideshow I explain why these high-flying biotech companies are losing some of their luster and whether investors should consider buying them, holding them, or selling them. 

This $19 trillion industry could destroy the Internet
One bleeding-edge technology is about to put the World Wide Web to bed. And if you act right away, it could make you wildly rich. Experts are calling it the single largest business opportunity in the history of capitalism... The Economist is calling it "transformative"... But you'll probably just call it "how I made my millions." Don't be too late to the party -- click here for one stock to own when the Web goes dark.