Doing ineffective altruism by taking all the money I made from being a finance ghoul, converting it into gold, burying it somewhere in the wilderness, making a vague treasure map to it, splitting the treasure map into 10 pieces, hiding them in various classical art pieces around the world, and then making up a series of riddles leading to the map pieces so that there is a non-zero but infinitesimally small chance the money will help someone some day.