When talking of kids or young ones, I'm not sure of which age bracket we are referring to here, but nevertheless, as children grow towards the young adult age, they need to be prepared for (and aware of) the world they are born into. There are countless of things to teach them which part of them are about Technology, Economics, Politics, History and all, if they are well taught about these, lessons about cryptocurrency will come in with no effort to forcefully instill it in them.

And I also think that as things are going now in this age, children would not need to be taught about cryptocurrency before they hear or know about it, the lessons that should come from Parent/guardian to them is how to be save while in the cryptocurrency's sphere, they should also be given financial advices needed to be successful at it (if at all the said children want to venture into it), myth about cryptocurrency should also be address in order to prevent the kids from straying in their journeys into cryotocurrency.