11Roman gold coins
A man named Wesley Carrington unearthed a hoard of Roman gold coins worth $156,000 within 20 minutes of his first time using a metal detector.
The $100 bill has surpassed the $1 bill as the most common US currency denomination in the world.
13$1 million coin
The most valuable legal tender coin in the world is a $1 million Australian coin, but because it weighs 1,000 kg and is made out of 99.99% pure gold, it is worth almost $45 million.
There are no U.S. quarters with 1975 as the mint year because commemorative 1976 bicentennial quarters were being minted early in anticipation of collectors snatching the coins from circulation.
The switch from $1 bills to $1 coins would save American taxpayers approximately $4.4 billion in the next 30 years. This is because coins are significantly more durable than paper bills.
16US penny and nickel
The US Mint takes a loss on penny and nickel production, costing 1.7 and 8 cents, respectively. However, with dimes and quarters costing 3.9 and 8.95 cents to produce, the US nets nearly $400 million per year because of “seigniorage”, the difference in costs to create all currency and face-values.
A man named Brad Wilson earned 4 million airline miles for free without breaking any laws by using his credit card to purchase free-delivery $1 coins from the U.S. Mint.
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A pound of any combination of dimes, quarters, and half-dollars is worth $20.
The "dollar" is an anglicized version of the dutch "daler", which was in heavy use in the Caribbean and New Amsterdam (New York) from 1600 to 1800s. The Daler is short for the German "Joachimsthaler", a currency that was produced in the 1300s in Joachimsthal, Bohemia.
The Spartans used cumbersome, impractical iron sticks (Obol) as currency "so as to discourage the pursuit of wealth".