Er... no? Except maybe if you are part of a specific cryptocurrency "bubble", but I'd say that for the typical HN reader, "crypto" still means cryptography in general, not its specific blockchain-related applications.
If that were true for the "typical HN reader", then most articles submitted with "crypto" in the title would be referring to cryptography, not cryptocurrency.
Well yeah, as we all know the title of a submitted article has to be left unchanged, and due to the cryptocurrency hype most articles referring to "crypto" will be actually cryptocurrency articles. But I still trust the "typical HN user" to be able to tell the two apart using just the title. And if anyone should stop using the word "crypto", it's the cryptocurrency guys, not the cryptography guys mumble mumble
I had to read the article to verify that this is not the case here.