What are we considering a kiddy? I mean im 24 and I would agree most people my age have zero idea what bitcoin is, but also most people in their 40s have no idea what it is either. If we take it a step futher I would claim but people my age and in their 40s dont even know what the S&P500 is. The vast majority of people are terrible with investing knowledge.
I'd even go a step further: 40+ people are the ones holding the biggest part of the Bitcoin cake.
Most likely...
After all people in their 20s don't have the financial means to compete with an adult with a really good, far over the average wage, unless they are coming from a wealthy family. But in this case it would still be the parents those that are putting the money into BTC.
And young one are most inclined to "live their life" rather than think about investments and the ones that are forced to seek work and search for income sources, again they don't have the funds for it.
Probably the youngest investors that hold some real stashes are the Winklevoss twins but even they are approaching 40, only 3 years to go.