If they called it GOLD I would be entirely in favor.
Gold will soon be over US$1000 per ounce. Silver could be a better standard since it may only be $50 or $100 per ounce. A one-twentieth ounce Silver coin could be $5. A half ounce silver coin could be $50. (The old Liberty or Franklin half dollar coins had 0.36 ounces of silver).
Gold has it’s problems, too, (zero-sum economy, very little ability to borrow money, can’t prove you actually have the gold when you receive a gold-backed paper bill) but it’s better than a UN global currency.