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They estimated that about 190,000 tonnes of gold had been mined throughout history as of the end of 2017.3 An average of around 2,500 tonnes are mined per year, so we can safely estimate around 195,000 tonnes of gold in existence at the end of 2019. There are 32,150.7 troy ounces of gold in one tonne, and the price of gold per ounce was $1,615.50.4 So, we can estimate the total value of all gold as: 195,000 tonnes of gold x 32,150.7 troy ounces per tonne x $1,615.50 per ounce = $10.1...