If what you say is true and it predicts the future, then everyone would be selling right now. The fact is, no one knows when or if the bubble will pop, and we will only be able to say in hindsight whether your comparison is correct.
There will come a point, probably in the next year or two, when investors realise this is true and it predicts the future. And then they will start selling. And that's how the bubble pops.
Bubbles always pop. The question is only ever about the timing.
