unfortunately as with most of those articles, you can just replace the object with any other topic really without damaging the general content of the article, like "why design is vital for digital education", "why design is vital for social security", "why design is vital for ...", you get it - it's gonna be the same article more or less.
tl;dr Good design = good design, crypto buzzword is the clickbait to get you to read the article
I agree with much of what you've written in this article. It's important to emphasis that the design of cryptocurrency is the job of both the blockchain/exchange/wallet developers (technical processes) as well as designers (UX). I think cryptocurrency has a really long way to go in terms of UX, but I'm glad people like yourself are working on it :-)
Any designers with thoughts on the subject?
I'm not sure how design is going to convince me a currency that would only be usable for me if I were looking to purchase black market guns, drugs, or child pornography is something I should start adopting or collecting.