Nymph Coins are an in-game currency you can use to get various items (Nymphs Shells, Gargoyles, Treasures, and Keys).

Nymph Coins are stored in Buildings called Treasuries.
Treasury capacity determines the number of coins you are able to store.

If the amount of Nymph Coins exceeds Treasury capacity, please make sure to have more building sites available or merge those present on your Home map

You can earn Nymph Coins by harvesting Bras & Panties, harvesting Ruins, activating Treasuries, opening Safes and Selling items in the Home area.