Gold

Gold is is used as a type of currency in this game to buy every kind of items: potions, equipment, furniture, seeds, etc. And for many other things. All towns or villages have 1 or more shops where you can use your Gold.

How to get Gold

 * Fighting monsters, they will always drop Gold once you defeat them. You can increase this amount with Gold ×2/×3/×5 Antenna and with equipment with Gold multiplier.
 * Selling items in any shop.
 * Selling items in Bazaar Island. It will give more gold than selling in other shop, but it requires other players to buy it.
 * Lending a Denpa Men in Rental Island, you will receive gold if your Denpa Man is rented by a player.
 * From chests around the map. Also some green chests in Caves of Darkness.
 * From Exploration Base, when Denpa Men come from any dungeon.

Where to spend your gold
- Renting Denpa Men from other players in Rental Island. The Gold you need to rent it depends on its level and on what it has equipped.

- Summoning Denpa Men from previous games in Summoning Lab.

- Buying items from other players in Bazaar Island.

- And, of course, buying items from shops all over the world. These are the places where there are shops:
 * Digitoll
 * Volcano Village or Hot Spring Village (depending on your progress in the story)
 * Fisherman Island
 * Cannon Village
 * Coliseum
 * Forest Village
 * Fairy Village
 * Snow Village
 * Underground Town
 * Garden Island 1

Tips to farm Gold
The fastest way to get Gold is killing Crowns in Cave of Darkness 3, but it is hard (read here strategy to kill Crowns). So to start, I recommend getting Gold by fishing and then selling the fish when the dwarf in Fisherman Island says he pays lots. Or killing strong monsters (Havoc Dragon, or monsters of Guardian Tower or Squelch's Home) with Gold Antenna and equipment with Gold multiplier, if you have. Then use that Gold to recycle ☆6 items (read here for tips to recycle). You can get good equipment to kill Crowns as well as equipment with Gold multiplier.

If you get Octopus Arms by recycling ☆6 but you still don't have enough equipment for Crowns, you can start with Golden Fangs. They give less gold, but they are easier to kill with only Octopus Arms and Legendary Sword/Monster Tail.

So basically, keep recycling ☆6 until you get enough equipment to fight Crowns. Then it will be fast. Each Crown gives 2 million Gold if you have ×20 Gold multiplier.