Nikesh Arora on the best investing lesson he learned from Masayoshi "Power Law" Son: “He's the oldest man I know with the risk appetite of a teenager. As he gets older, his risk appetite becomes bigger.” “He looked at me and says, ‘If you're putting that much effort on the company that's doubling, they might quadruple.’” “As operators, our tendency is to try and fix everything because we don't want things to break.” “As an investor, he said, ‘Double down on your winners. They're gonna be…