In Diablo IV, gold will serve as the primary currency used for trading with vendors and other players. Players will be able to use gold to buy and sell items, repair equipment, and upgrade items through enchanting.
Gold will also play a role in the game's crafting system. Players will be able to use gold to purchase crafting materials, and they will also need gold to pay for the services of NPC craftsmen who can create and upgrade items for them.
Additionally, gold will be required to use certain features in the game, such as the transmogrification system which allows players to customize the appearance of their equipment.
Overall, gold will be a valuable resource in Diablo IV, and players will need to accumulate it through various means, such as looting it from enemies, completing quests, and selling items.