An investment in these players today could score a big win down the road. Why do investors love biotech stocks? Because these players often work on game-changing technology that could lead to tomorrow's game-changing treatment -- and potentially blockbuster revenue. As an investor, you often have to be patient, as it takes years for a company to bring a candidate through development and reach the billion-dollar revenue stage. And you have to be comfortable with a bit of risk too, because candidate failure a ...