"Designing banknotes is a unique art. Each nation has currency notes of various denominations. Each denomination may feature a different design. Most of the designs depict a nation’s culture and heritage...Coins are usually made for subunits of currencies, but several nations have issued coins for the lower denominations of their currencies. When the intrinsic value of the metal used to create the coin exceeds the legal value of the coin, some people collect the coins in large numbers and melt them to extract metal"