I bet there are some millionaires in mom's basement, teens who have BTC but don't know what to do with it. Think about when you were younger, it would be hard to figur eout how to sell it, and do things like taxes, and your parents would be all over your case to figure out what BTC even is...
It would be a very disciplined teen to have held on since the early days. I'll bet an awful lot of coins were squandered or lost long before we reached today's price levels. It must be a sweet feeling if they did sit tight.