I can tell you exactly when they're going to crash - the moment I overcome my inertia, and decide to get rid of mine.
Maybe I can recover some of my losses by telling people, for a price, right before I sell mine.
This subject reminds me of stocks; when someone tells me they know what the market will do, I grab my wallet tighter. But, with so many people guessing, somebody is going to be right, and then they'll be hailed as a guru, until the next thing comes along.