I played the stock market game in grade school and noticed this one stock, BRKHA that was moving thousands of dollars daily (and was occasionally dipping into the hundreds). Considering the others would only move a fraction of a dollar daily it was a goal to get one share for the game. I did and ended up winning.
I should have tried to pressure my parents into at least one share. By the time I was 18 it would have been worth 70k, and these days it's up to.. Nearly 700k per share.
I would've likely sold it on my 18th birthday and been able to languish a bit longer than I did. All in all it wouldn't have been worth doing.