Tesla's stock is not for the faint-hearted.Tesla (TSLA -1.64%) has long been the front runner in the electric vehicle (EV) revolution in the U.S. Its innovation, brand strength, and rapid growth have made it a favorite among investors.Yet, despite its impressive track record, there are two big risks that investors should carefully consider before buying Tesla stock today. 1. The Elon Musk factorElon Musk's leadership is often cited as Tesla's greatest strength -- and, paradoxically, one of its most signific ...