Some ideas arrive in the world not with thunder, but with a quiet insistence that everything familiar is about to shift. Cryptocurrency was one of those ideas. It didn’t knock politely; it seeped into conversations, into headlines, into dinner tables, into the hopes of the young and the caution of the old. It dissolved the boundaries that once separated the “experts” from the “ordinary,” inviting everyone — every age, every background — to reconsider what it means to trust, to exchange, to st...