Really, there's no harm in teaching them something useful for their future. We know bitcoin is one of the best in crypto both from its use cases or its huge potential as a great store of value in the long term. I believe kids aged 15+ deserve this knowledge especially if they are genuinely interested in learning it. This will foster great interest from the child in what they are learning today.

Bitcoin would be a great thing to learn regardless of what one's ultimate goal towards it is. 20 years from now, bitcoin will likely be even better off than it is today, I hope so.