Washing yourself with money is probably a bad idea, unless you're using the Zelda Rupee Soap. This soap is designed to look like the currency used in the Legend of Zelda series and was created by Etsy merchant Tracee T of the shop SmallThingsForSale.
While you can't exactly buy things with the Zelda Rupee Soap, you can select your fragrance. Also, you can bathe easy knowing that each bar is vegan-friendly, hypo-allergenic, paraben-free, and biodegradable. Additionally, all of the additives are cosmetic-grade and skin-safe. The Zelda Rupee Soap comes in packs of four and sells for $5. Tracee T's shop is filled with other kinds of gamer soaps, such as Portal 2 and Super Mario Bros. soaps, should you not be a Zelda fan.