I think it doesn't matter that much. Most people will end up using some form of crypto eventually, just like most of us use some form of motorized transportation. But, how many people who ride in a car or bus or whatever understands what the 4 stroke cycle is, or the difference between a 4 stroke and 2 stroke motor, or what the distributor cap does, etc. It is useful, so they use it. As things progress, solutions continue to evolve that require less technical expertise, and people get used to using it. Some day, it will be common just like credit cards, and most people will just use it. Those who want to dig further will do so, but I think most people aren't interested in how it works. All that said, I don't think it's a bad idea to offer classes. Probably see 4 year crypto bachelor's degrees sooner or later.