Investors have mostly given up on this sector, but returns have been massive over the long run.It can pay to track the investing legends. Billionaire Stanley Druckenmiller put up 30% returns for 30 years when running his hedge fund, and he never had a down year for his investors. Clearly, he is one of the best investors out there, making it worthwhile to track what he is buying and selling.While you shouldn't blindly follow the investing legends, it can be a great source of inspiration for potential new sto ...