The "crypto" world, as in Cryptography has far more practitioners and far more hardware and software than cryptocurrency. And most of of the world's communicati

The "crypto" world, as in Cryptography has far more practitioners and far more hardware and software than cryptocurrency. And most of of the world's communications (among other things) rely on "crypto" as in Cryptography. The "old" usage (as you put it) remains orders of magnitude more instrumental to all of our lives than blockchain technologies (which is a far more accurate name). And will remain so, for the rest of all of our lives.