As Michael Tellinger points out, money has always been about gold.
Almost the last relic of the British Empire to fall is the LBMA (London Bullion Market Association) which for many years has set the daily gold price that was used by London gold traders and no doubt gold traders around the world, but the world now wants a "fair" gold price.
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This is part 2 of a two-part interview. You can watch part 1 here.