Learning to adequately estimate probabilities and make decisions based on those probabilities is extremely powerful, and that's true whether you use those skills in your investments, your career, or your relationships. You can get a lot of practice on sites like Metaculus[1] and Manifold Markets[2].
I've also found a lot of useful discussion around these and similar skills on LessWrong, a site dedicated to the art of recognizing and correcting errors in reason and cognition. That site is full of 10x multipliers, particularly in their "Best Of" collection[3].
[1] https://www.metaculus.com/questions/