Earlier quoted context omitted.
Oh yes, but that's a much different question and is strongly conditioned by where Bitcoin and cryptocurrency are in the hype cycle (I'm using that term empirically, not normatively). You'll find at least that much negativity about other technologies and startups that have gotten to similar stages of (let's call it) ultrasuccess. Just look at the threads on Airbnb or Uber, for example. They're so vitriolic and repetit…
There tends to be ethical concerns as things get this big that apply to all of: Bitcoin, Airbnb, Uber. Try Dropbox or even Digital Ocean for a more loved company/idea.
People reach for the handiest hammer, but it doesn't follow that the hammer is driving the hammering. Ethical concerns are the best hammer, of course, because then one's own motives are unimpeachable; but failing that, you'll see comments about the business being shitty for other reasons—"it used to be good but they've been declining for years and I can't even use it anymore" is one, and "how is this a viable business, look at those financials, doesn't anybody care about profit anymore god this world is insane" is another.
I don't believe Dropbox threads are generally friendly to Dropbox anymore, and I'm pretty sure Digital Ocean has been on the rack here too. Today's thread was a noticeable exception. Most S-1 threads are pretty cranky in general.