He also seems to think many or most altcoins might possibly decline to near 0 in 2019.
Well, when he talks close to zero, this can be possible with many altcoins and as he does not specifically say what altcoins are that can fall to zero, then it seems that he is right, but in fact this is something that any person must have noticed. I think that doing this kind of comment in a time like this is not a good thing, because it only creates more unnecessary panic. Many altcoins are falling because people are selling to buy bitcoin and the reason is probably because of September 30th.
Does he still think we could see a blow off top near 40-50k?
It will be very difficult to reach these prices