Best reply so far!
The Saudis have openly admitted that their window of opportunity regarding wealth derived from oil will be a short one. They know an alternative source breakthrough will eventually come, and their remaining oil will be worthless. It reminds me of the story of the man who once had a near monopoly on ice houses in America. Then, in the 1920's, Sears started selling refrigerators. Suddenly, one of the wealthiest men in America was broke, and it happened in a period of just 10 years.