Cybertronian Currency

Although each city-state has been known to occasionally code or mint its own coin across various stages of history, the only stable currency were those backed by either actual collected energy or rarefied metals. As energy became scarce across Cybertron, energon itself became a form of currency, although it was difficult to transport and exchange until the recent invention of energon cubes. In dealing with offworlders, however, energon is less useful as a currency, so the intergalactic shanix has become more and more common as coinage that is accepted both on and off Cybertron. As such, other local coins have fallen out of favor and many have lost their value completely.