Kids can only get so many by mining. Don't imagine too many teenagers have 10+ bitcoins without family help in getting them.
what is your point exactly?
if anybody wants they can come up with $30k and invest it in bitcoin. it is not really that big a deal in my opinion as long as they are willing to take the risks.
so if some young person owns above 10 bitcoin that simply means they were willing to take the risk and enter the high potential currency of the future in its early stages while others stood aside and watched.