Gemini, the cryptocurrency exchange founded by the billionaire twins Tyler and Cameron Winklevoss, has resorted to a popular tactic to boost activity on its derivatives exchange. The company plans to launch its first-ever "leaderboard" competition in August, offering prizes and recognition for the most successful traders, according to a recent report from Bloomberg. ... Read More: Winklevoss Twins Implement Leaderboard Tactic on Gemini to Boost Derivatives Exchange