Words don't belong to anyone unless you register a trademark or some equivalent. People refer to cryptocurrency far more frequently than cryptographic algorithms lately; it's inevitable that they would start appropriating the shorthand word.
I think most people stopped caring a month ago, this stupid name is going to stay.
You are correct, but that battle is lost.
cryto = cryptocurrency now... the masses say so.
You can start using the full term "cryptographic encryption" instead.
Is your issue specifically that I posted a link to urban dictionary or that I posted an accusation of gatekeeping?
The GP comment was already off topic and predictable—in the sense that it gets repeated all the time these day—but your response was further off topic, borderline uncivil because of the accusation aspect, and the internet trope thing is definitely not something to practice on HN. I understand the temptation to post these things, but it's a temptation that needs to be resisted if we're to have higher-quality discussion here.