To me, 860K is bonkers...many people would be at least rich-lite (or well off) with just 3-5 btc.
There was a time when 1k seemed bonkers (RIP Risto). Though I do concur with the sentiment.
I don't doubt that I'll see a $1M btc in my lifetime.
But then my thoughts go immediately to, what will the dollar $ be worth by then?