I really hope that all of the teenager would invest in bitcoin so they can use it in the future,
I really regret that I didn't know bitcoin earlier if only I knew it when I was a High School student maybe I already have a huge amount of money because of bitcoin.
This is the most common regret but the truth is we would not have invested anyway even if we knew about bitcoin at that time since there will not be a way for us to know the price will reach such great height.