That's the original title and I'd wager most people read it correctly.
That's unlikely. Before cryptocurrencies, "crypto" generally meant cryptography. The term "crypto" now refers to cryptocurrencies almost 100% of the time.
I consider crypto to only refer to cryptocurrency in an informal, non-technical context, or in the middle of a paragraph talking about cryptocurrencies. On HN I kind of expect crypto to refer to cryptography with the amount of programming and computer science posts that get discussed here