In Neverwinter you will see many currencies, from usual gold to extremely rare tokens. Some currencies are used to trade for basic goods and equipment, others are used to buy better gear on consumables.
Almost every currency is placed in Riches tab of your inventory. Only Bounty tokens are held in usual inventory slots.
Some vendors offer items for more than one currency, there are even shops accepting almost every major currency in game. Companion vendor in Grand Emporium in Protector's Enclave is example of such shop.