I don't know what you guys are smoking but any type of economic activity is good for a currency. It doesn't matter if it's the girl scouts or ransomware. I don't believe the ransomware market is anywhere near that big though. I'd be surprised if it was 1/10th of that.
You guys?
I said it was (probably small) positive due to the holding period (i.e. activity). Ransomware operators might keep some BTC too, though I doubt it is much. No one other than speculators wants BTC; everyone who uses it just seems to treat it like a hot potato.
I don't think the size estimate on the ransomware market was outrageous. That's actually a small number for something having the visible footprint of ransomware.