Some points make sense, others are too weak to accept them as arguments, and others are predictions. One can say that sometimes Bitcoin enters the bubble state (like at the end of 2017 and possibly the one Bitcoin can enter soon), but calling it itself a bubble is wrong. Sometimes Bitcoin is overpriced and keeps getting overpriced until it bursts. However, while a bubble usually explodes once catastrophically, and never reaches popularity again, bitcoin is not like that. And Bitcoin never reached anything close to zero, whereas bubbles are usually identified in hindsight (so even if Bitcoin is one, we can't know that yet). And Bitcoin value being zero doesn't make any sense to me.