While silver has been widely used as money in history, at the beginning of the 19th century gold became the dominant metal in trade. At the end of the 19th century central banks erupted around the world and began holding gold in reserve to back their currencies, the international monetary system in this period is known as the classic gold standard. When the last remnants of the gold standard were officially left behind n 1974, and the world was on a fiat standard, central banks held on to their gold. This can only be explained as insurance in case the fiat standard wouldn’t succeed, concomitant admitting there is a reasonable chance fiat money will fail. [...]