When the child is off-age, as the parent who is interested in bitcoin, you can just call them together, even if it's just a single child you have. You can give them a child-to-parent kind of talk and share your basic knowledge about bitcoin with the child.
How they respond and the interest the child picks up from the teaching will determine if you should go further or not. I think we are now in an era where children are more exposed and know how to make choices on things they want even before they reach the age of 18.
Sharing knowledge about Bitcoin with children will of course be very good, but we also need to pay attention to them whether they have an interest in learning about this or not and if they really have a curiosity about this, of course we can first explain to them about it. the basics of Bitcoin until they reach adulthood, then we can explain Bitcoin in detail to them, but if they are not yet interested in this, it would be better for us not to force them to learn about Bitcoin earlier and we can continue to do things. what we should do to prepare our future better and we will be able to teach our children after they grow up.