A fictional currency is some form of defined or alluded currency in works of fiction. The names of such units of currency are sometimes based on extant or historic currencies (e.g. “Altairian dollars” or “Earth yen”) while others, such as “Kalganids” in Asimov’s Foundation series, may be wholly invented. A particularly common type, especially in science fiction, is electronically managed “credits”
http://en.wikipedia.org/wiki/List_of_fictional_currencies
Galactic Credit Standard:
The Galactic Credit Standard, simply called a credit or abbreviated to cred, colloquially referred to as Republic Dataries, and later known as the Imperial Credit, was the main currency in use in the galaxy since the time of the Galactic Republic.
Galactic Credit Standard | Wookieepedia | Fandom
How do they compare vs NuBits?