Not cryptocurrencies but Blockchain and its general applications that should be added in student's syllabus. We all know that crypto is just one part of the technology. Teaching them crypto investment at this stage is like teaching them how to gamble on this highly speculative market.
I think that blockchain needs to be taught as a subject but as a part of an already existing subject because I feel like it's not going to do any good if we make it a subject since it's not in everyone's interest and @Obito is right, it should be a specialization.