Nah, it’s a word in English, and what words mean can and do change over time in all languages. I’m not saying that using “crypto” to refer to cryptocurrency won’t confuse people who think of it as cryptography, but we need to ask for context if it’s not present.

Registering a domain and putting one sentence about what a word means for the domain owner most likely won’t tilt popular opinion. Maybe providing more context, history and why the currently popular usage may be confusing or even harmful (?) would be better. Well, I could register a domain called cryptomeanscryptocurrency.com and put a couple of lines in it that say “Crypto means cryptocurrency, as seen on TV and in the media; don’t trust those who use that term to refer to cryptography (they could just say cryptography anyway)”. That would be as devoid of meaning as this site shared here.

Sorry, this battle has been long lost, and it’s not a hill I care to die on.

I have 17 million things more important to me than the definition of crypto.

It's Greek for hidden or secret. Neither of which apply particularly well to cryptocurrencies. Cryptozoology, for example, makes much more sense.

Cryptography: literally "hidden writing". It's a beautiful word.

In a cryptography context crypto can be cryptography, in other contexts it makes more sense to assume cryptocurrency. The cat is out of the bag.

What gives you the authority to define vernacular? Stated another way, words mean what people understand them to mean. Most people would understand crypto to mean cryptocurrency at this point, sorry. Cryptography is definitely more niche.

I “literally” “could care less”, if you know what I mean.