Founded a venture-backed startup at 19; sold it. Could have retired at 23.
Kept accidentally falling into interesting work every couple of years; doing it for awhile, and retiring again. Some of it lucrative, some of it not.
Accidentally started coaching school robotics teams at 38. They did well; role grew in scope. Now I am 43; teaching HS economics, MS robotics/engineering, and a few other random things full time.