How about if there's a subject added in school
For crypto trading?
I don't think schools will allow it in that way (trading) because that will be considered as teaching kids some gambling. I don't think schools will dedicate a special subject to bitcoin because they are also a part of this central governmental authority (that does not simply like the idea of cryptocurrencies). However, in 2015 I was a taking International Financial Markets course and there was a special subject in the syllabus related with bitcoin. I believe that has already gone deeper.
On the other hand, I cryptography is an official subject in many tech schools (related to information technologies), and I believe topics on bitcoin will play a key role in those subjects in the future!

For elementary school lessons of course crypto will not be done/or implemented in subjects in school because of certain rules. whereas when you've entered college/campus you can go to certain majors such as economic management, mathematics and other. of course there is a subject about trade. then maybe the subject of bitcoin can listed if bitcoin more popular in the future