Coins
From Emps-World Wiki
Coins are the main currency in Emps-World. Almost every monster drops an amount of coins when killed but you can also obtain them by selling items to stores.
The maximum amount of coins a player can hold is 2147,000,000 (2147M). If a player decides to go over this limit, they can buy 'perfect' gold bars in Falador, which cost 100,000 (100K) coins each. These gold bars can be sold to the store again for the same price they were bought for. They are also considered a second currency or a temporary placeholder for coins.