It's a great idea that we can teach cryptocurrency in school but I think it is good that it is in highschool rather than in lower years. So they can know how and what cryptocurrency is and they will know what its effect in the current economy or the gains of using it.
I am sure that cryptography is being taught to the students in the high school and it is one of the mandatory subject for the students, but I think it is related to only information technology and not to every student of the high school. I think it will be better to teach this cryptography to the students of finance and business as well and the relation of cryptography and finance which is used in the bitcoin. I think this is how we are going to mature this in the coming days with new in genuities in the technology.