That would make a great thought exercise or dare to predict what form will the economy be or what it will look like. Silver and gold will still have their uses in everyday life. Personally I expect the entire oceans will be mapped and every sunken ship located with their treasures recovered by the current amazing GPS and remote drone technology.
!BBH
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That's a wild and amazing thought. Probably more gold and silver on sunken ships then in many mines! !BBH