Smart people don't know they're smart, so they do everything naturally, and it's us who judge by their actions that they're smart. For me, a smart person is someone who doesn't argue, even when the opposing side is clearly wrong, because they know it won't change anything. Second, they can always present facts and data when they make a claim; it's not just random claims like people throw around nowadays. Third, they can easily adapt to changes, even if they're sudden. Fourth, they have Bitcoin!