I notice that you say "probably" gone for good. A guess on your part. With trade wars, currency wars, and the chance of hot wars, only a mug would rule out future gold backed currencies. In the struggle for trade supremacy (china/Russia vs USA/UK), it will be the bloc with the most gold which eventually will have the strongest currency. China 20,000+ tonnes. could back its currency with gold USA 8,133 tonnes (?). will not, unless forced to. you are a brave man to rule out a gold backed Yuan.
