(UltraEconomy) Option to have multiple items if different worths in a currency

[BookWyrm114]

Allow users to add multiple different Icons/Items in a currency, each with different worths. so for example users could have copper, silver, and gold coins. all are in the same economy but copper would be worth 1, silver 3, and gold 5. (this would also work very well with another feature I suggested, which would allow users to use custom modeldata on icons for custom textures)