Over the last 5 years, I've used every social investing product -- but they all tend to fail in one key spot: Closing the gap between (a) your belief about the world and (b) how to express that belief with stocks. Mike reached out early in the summer and showed me @Supertake, which solves this problem in the most fun way possible: prompt with AI and it constructs a portfolio around your belief. With the declining cost of intelligence, we're going to see much more sophisticated investing…