If we have noticed this generation of children are way wiser than their age and the rate at which the get information is way so amazing. Many of this kids start making money early either through gambling or through other means and lots of them do this because the don't get enough money from their parents.
I think the age doesn’t really matter, any child can be taught about cryptocurrency at any age, as long as they can understand it . Take for example we can see the news of the two little kids that were able to make about that $32000 from mining Ethereum. They were able to achieve this by making use of their old game console. And these two kids didn’t just learn about cryptocurrency, they were taught by their parents. And that this little age they have been able to turn it into a business that generates a huge amount of money. So, imagine that they were never told about this, we then have been able to achieve this much and as such age?