Gold accumulates automatically in your claimed Gold Mines. To collect the accumulated gold, just touch the mine. Arguably, of the four collectible resources, Stone is currently more valuable than Gold.
The maximum amount of gold a dungeon can hold is 13,401,500:
- 4 x Treasuries at Level 11 (3M each)
- 4 x claimed Gold Mines at Level 13 (350k each)
- Dungeon Heart (1.5k)
You can also earn gold by Raiding, and is dependent on how much damage you perform, and the level of your opponent.
There are several ways to spend gold: