This is further elaborated in the following quotation.
"To be workable and efficient, the monetary system needs to be supplemented with checkbook money and electronic money. But that means exposing it to the same tampering and manipulation to which the current Fiat system is subject. There was also the problem discussed earlier of keeping gold coins in circulation. If the coins are stamped with a value that is the actual market value of the metal of the time that coin is produced. They are liable to get smelted for their metal as soon as the market value goes up. Coins are therefore usually issued with a face value or nominal value that is far in excess of their intrinsic worth. But that destroys a very thing the coins are supposed to be good for preserving value. The more serious downside of using gold as a medium of exchange is that productivity becomes tied to the availability of the metal. When gold flooded the market after a major gold discovery in the 19th century, there was plenty of money to hire workers so production and employment went up. When gold was scarce as when the bankers raise interest rates and called in loans. There was insufficient money to hire workers so production and employment went down. But what did the availability of gold have to do with the ability of farmers to farm, of miners to mine, and builders to build? Not much."
Instead countries begin to use the currencies from other countries that are stable. The logistics problems with gold are explained in the following quotation.
"There are major practical problems involved in using gold as a medium of exchange. If only gold is used pennies, nickels and dimes will be so small, they'll get lost in your wallet, while large purchases such as houses will have to be transacted and gold bars too heavy to carry in a suitcase."Source: The Web of Debt
https://www.amazon.com/Web-Debt-Shocking-Truth-System/dp/0983330859