I delight in exotic foreign currency. If they want to use such coins, what skin is it off our nose? The thought of a uniform worldwide currency is repulsive to me.
I’m talking not about some exotic foreign currency, nor about a uniform worldwide currency, but about the metric system in use in our own currency: 100 cents to the dollar, instead of 20 shillings to the pound, 12 pence to the shilling, and four farthings to the pence.
Thomas Jefferson was a big proponent of the metric system, and even proposed a system of measurement based on an iron rod with a 1-second period of vibration, with 10 points per line, 10 lines per inch, 10 inches per foot, and 10 feet per decad.