I did not realize I was interpreting the Constitution in any fashion other than what the words say one of the duties of the Congress is; To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures;
I gather you don't like that interpretation so please express yours.
I presume we would be in agreement if I state a dollar is supposed to be money. We may not agree that money is supposed to have intrinsic value, that is, a substance or amount of work that has made it valuable. What is the value of a piece of paper and a dab of ink? By changing the number on a piece of paper doesn't make it more or less valuable.
Money is also supposed to be pretty stable and long lasting. For thousands of years, gold, silver, precious metals, diamonds, etc. were considered money until man, in his infinite wisdom within the last 50 to 60 years, made paper, by fiat, the monetary standard. An ounce of gold or silver refined 2000 years ago will still be and ounce of gold or silver today.
While true, over the history of Man, other items have been considered money, but like the Dodo Bird, they have all passed into oblivion. Gold, silver, platinum, etc have not made that same passage.