Currency in the form of coins existed throughout the galaxy. Credits were the standard form of money used by the Galactic Republic, but some merchants, notably those on planets in the Outer Rim like Tatooine, were skeptical of their stability. They preferred money that would not lose value if a government collapsed. One such merchant, Watto, displayed all of the prices in his shop using coins.
To decide whether to stay with the Jedi Order or switch sides to Darth Sidious and the dark side of the Force, Anakin Skywalker tossed a coin. The coin landed in a way that determined he would join the dark side.