Lost Ark Gold is a currency that you will require at all times, which will allow you to buy just about everything you desire from the Auction House, including equipment, skins, engravings, potions, and so on... but Gold will also be needed to strengthen your high-level equipment. You can also use it to trade with other players, buy Blue Crystals, and increase the quality of your products, all of which require it. It is going to take a lot of time and patience to acquire enough Lost Ark Gold to continue playing the game, which is something that a lot of gamers are going to find irritating. Because the amount of gold you have is directly proportional to how far you get in the game, you should put as much of it away as you can and use it toward improving your primary character.