Earlier quoted context omitted.
I think you're misunderstanding the author here. He doesn't argue that people shouldn't use Haskell because it's used in crypto currencies, quite the opposite he seems to love Haskell and want people to use it. His worry is that being associated with crooks will make the Haskell community less attractive.
My point is exactly that: a technology itself can't be tainted by crooks using it. Have innumerable script kiddies, scammers, doorway site creators, etc, used PHP for doing bad things? Did / do they constitute a significant part of the user community? Yes. Has PHP been used to create wonderful and world-changing things, like Wikipedia? Does PHP have great, very nicely designed tools that help people develop good thin…
https://slatestarcodex.com/2014/09/30/i-can-tolerate-anythin...