There are 4 currencies:
R-bucks: You can gain Rbucks by purchasing in-game. R-bucks used to open the feature of Season Pass and buy items in-game stores.
Gold: Gold will drop out improvisationally when you reach the monument in Ranking Rewards or join a Special Event. Gold can be used to buy premium items in in-game stores.
Season Points: Season Points are a currency to purchase items in Season Pass Earning season points when finishing the battle, completing your daily quest, or enjoying a special event.
Enhancer: Enhancer is an in-game currency. Receiving Enhancer while finishing the battle or participating in the Special Event. Using Enhancer to evolve the skin of the character.