During the height of the real estate bubble, I wrote a column saying that the crash was coming and suggested selling any piece of real estate that was overpriced, questionable, or non-performing. As expected, I received angry replies. Today, I'm predicting the next crash, what I believe will cause it, and why it'll be a severe blow to the global economy. The signs are already here. Busts Beat Booms First of all, it's no big deal to predict booms and busts. All markets boom and bust. It's just easier to predict a bust because the signs are so obvious --...