He said stores should check the quality of the paper and printing, as well as the metallic security thread and watermark.

BBC: Counterfeit notes warning for East Lothian shopkeepers

Demand for gold appears to be fueled by uncertainty and a move toward hard assets that provide security beyond a piece of paper that can be debased by the printing press.

FORBES: How High Can Gold Go? Just Look At Oil, Equities, And Money Supply