My dad had been a billionaire in neopets because of the stock market back in the early days. Then he taught me the most valuable lesson in finances I'd ever had. He gifted me his neopets account and I managed to blow his entire fortune on fast cars and fast women. Actually I have no idea how I spent it anymore, but suffice to say it made me learn.
I really did xD But it was a super valuable learning experience, and my Dad's only regret was that he didn't have more accounts he could have used to teach his other children.