Players can only hold a certain number of cents before reaching the limit on the wallet. Cents are used to buy items, gear, a night at an inn, etc. Running from battle will also cost players some cents. If they don't have enough money, they will be unable to escape from an unwanted battle.
As of a recent update, excess cents gained from battles that exceed your wallet limit will appear around the battle arena, but will despawn after 5 minutes.