We are definitely in a world of technology right now, so kids these days understand technology better than when we were their age, so I don't see anything bad of you decode to teach your child about bitcoin investment, buy I think we don't have to teach them too early, because they might not comprehend what it means, despite the fact that they are well technically inclined. In my opinion I think it's good to teach your kids about investment, nit only botcoin, so they can understand the importance of investment and also grow with it. Children tend to learn very fast and it's what they see you do or what you teach them that they will learn, so letting your children understand the importance of investment of any kind is a good thing to do.
These little munchkins knows plenty things more than their elder. I remember sometimes ego that I got lost with trying to remove my number that was always showing up as private number anytime I call person. I try to fix it for months, but I was unsuccessful. My little cousin came to visit me and hear when I complain about it and just then he fix the issue for me, and till now that problem is no more. It is so pointless underestimating what they can do, because of how smart and wise they are.
If person introduces Bitcoin to them they can even grab it very faster and easily. I am not even surprised about that because that age is the age that is suitable for them to learn and understand things easily since they don't have serious things they are thinking about like we that are the adults. Their brain is still a tabula rasa, like John Locke will always say. It is still blank and it can grab any knowledge that it get hold of.
Children can start with learning the basic of investment, they don't need to bored themselves with the technical side of bitcoin. And along the way they can begin learning more and more till they become professionals. There is a hell lot of difference in the level of understanding between person that began learning bitcoin form small with a person that just started learning bitcoin in old.
I was busy mining pie and shouting 'Up Nepa' when I was young, I cannot let any of my little munchkin make that same dumb mistakes.