First published by Money Metals here: https://www.moneymetals.com/news/2016/12/29/power-currency-to-money-000979

While you ponder whether or not the Benjamins and Grants in your pocket should continue circulating – consider that what you are able to buy today with a $100 bill, took less than $20 to acquire in 1970. As you read this essay, Indians are willing to pay the equivalent of $2,200 per ounce of gold, in order to get rid of their "power-less currency" in exchange for "power money" – gold and silver.