"It is possible, however, that the artist is both thin-skinned and prophetic and, like the canary lowered into the mine shaft to test the air, has caught a whiff of something lethal."

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If all currencies are moving up or down together, the question is: relative to what? Gold is the canary in the coal mine. It signals problems with respect to currency markets. Central banks should pay attention to it.

— Alan Greenspan