When I first heard “crypto” for “cryptocurrency” I was saddened because it seemed like the meaning was being coopted away from the “real” meaning of “cryptography”. But now, I think we're stuck with it. Words sometimes just have multiple related-but-different meanings. Like how a chemist's "organic" is different from a farmer's "organic". Or, perhaps more saliently to this community, Y Combinator's "hacker" is different from CNN's "hacker".