8 years ago, tech stocks, and the stock market in general, were frenzied bubbles. Pop. About 6 years ago, residential and other forms of real estate received massive investment. Residential has popped, and commercial/office is at a lofty level. Emerging markets caught fire in the last couple of years, and there are signs of stress in certain of those crazed markets (China has been going 'pop' on a regular basis - India got smashed - Thailand was cut down to size). What will be the next bubble that develops?