I remember agreeing with him for the most part on his last prediction. But when he predicted $10,000 by the end of the year (8 days ago), we all kind of saw it coming. No expertise involved. Now $40,000 is interesting, I can't really decide if this will happen next year or not because I need some sort of confirmation by the market.
actually his predictions weren't that obvious. Many people followed the elliott wave theory and predicted that we should have a large correction before reaching $10000, but BTC just didn't want to correct and kept going up. I think the last move was a switch between altcoins and BTC by whales who wanted to to ride the wave and then switch back to altcoins. This is happening right now, just look at the charts they started dumping like 10 min ago.