Been considering some of this lately, as I have a considerable investment riding it out right now. There's gonna be a Black Swan or something - possibly this b.s. with Trump vs. The Fat Kid, or something else, but...yes...unfettered growth is unsustainable. I find these short, sharp drops followed by record highs to be irrational, but the only way I can explain that is to say my gut says that's irrational. There are clearly nuances that I don't get, which is why I pay people smarter than I am to handle this stuff for me.