* business doesn't want to be getting paid out of ransomware ransoms

Exactly why I said my point 2 above.

  * at some point someone has to exchange clean money for ransom tokens

There is no such thing as "clean money" or "clean currency". There is fiat (aka: government money), which definitely isn't something I'd describe as "clean". It is usually backed by a bunch of people who tend to kill others (aka: US military) and that tends to be rather... dirty.

What is really going on is that they are referring to the crypto industry as some sort of "ransomware ransoms" and if you combine those two nonsense arguments (ransomware+clean), with the HN crypto hater bias, I didn't see it worth the effort to continue on, regardless of the downvotes I received.