Unlike any other 'investment' before it every bubble burst so far ends up with more people involved than were here when it started. Nothing else can do that as nothing else has risen literally from zero.
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We can say about any pyramid scheme that is has risen literally from zero, but what differs Bitcoin from them is that none of them can survive a bubble burst. When a pyramid scheme starts crumbling down nothing can stop it from total collapse, while Bitcoin has proven many times already that no bubble burst can kill it. And, as you rightly pointed out, the adopting only rises each time. That's why I think that until we reach a high level of adoption, from which we are far at the moment, every ATH will be repeated and surpassed eventually.