I agree and would like to re-iterate that yes, it is the child who will decide but in the end parents could (or should) bring the information to their children then allow them to decide if they want to learn more.
For example, if a parent thinks they learning about medicine/pharmacy, electronic engineering or rally car racing is going to benefit their children, it is their decision to teach their children about it and then leave it to the children to decide if they want to learn more.
Can we agree that as adults and parents it is our responsibility to educate our children on any topic and subject that we deem to be important? If Bitcoin is something we as parents have concluded is important to the future of our children, then we have an obligation to bring that information to their knowledge. After that, it is for the children to decide if they want to follow up to learn more or otherwise.
Even if the parents see Bitcoin as important knowledge for the future of our children, the child will still be the one to decide if he wants to learn or not. I'm not saying that telling your kids what you know about Bitcoin should not told to them, it's a good idea actually, but if there's no sign of showing interest, let them decide what is good for their future. Parents will only be their guide and the ones who will help them if needed.