It's interesting how the word-root crypto (meaning "hidden" or "secret") is used as a prefix to mean "cryptographic", but when used alone it's supposed to someh

It's interesting how the word-root crypto (meaning "hidden" or "secret") is used as a prefix to mean "cryptographic", but when used alone it's supposed to somehow mean currencies, as if there were some part of the word-root "crypto" that is related to currencies. If "cryptocurrency" is too long, can't one say "currency"? It seems more correct.