How falling dollar anticipates eclipse of US global economic supremacy

Skyrocketing debt, Wall Street deregulation, a fraying social safety net, and a diminished dollar could soon leave US looking like Greece

Donald Trump is the epitome of irrational exuberance.

You might remember that phrase from the 1990s. Alan Greenspan, the head of the Federal Reserve at the time, was describing how the tech boom was creating a bubble by generating enthusiasm way out of proportion to the actual value of the new companies.

Such an unwarranted economic boom was hardly something new, so it was easy to predict what would happen next. Periods of irrational exuberance — whether the dot-com expansion, Dutch tulipmania in the 17th century or the housing bubble in America of the 2000s — have always led to a sudden