Cryptocurrency is essentially a game only. The new Blockchain is real technology, and blockchain can grow without cryptocurrency, that's for sure. Teaching about cryptocurrency at school does not make sense.
If it doesn't make sense then why are you here in the first place? Teaching cryptocurrency in schools would be a big help for the cryptocurrency industry because it would make people be aware that it is not just a fad but it is a kind of technology that would be of help to the people and businesses alike. However, people should not just learn about cryptocurrency but of blockchain technology as a whole because it is the backbone of cryptocurrency in which it wouldn't exist without it.