Some old coins have face values up to $20.00. Dimes, Quarters, Half-Dollars, and Silver Dollars (not Susan B. Anthony Dollars or Gold Dollars, but the old ones with Dwight D. Eisenhower on 'em) weigh the same amount per cent of value. This is one reason the half-dollars and silver dollars went out of style, they're just too big.
Most countries have some form of coin currency in addition to paper currency.
I printed these instructions out, and this one was at the top of page 2. I found the first paragraph amusing enough that I had to show my boss.