There are many ways to obtain Coins in Ninja Legends:
Chests - The Space Island Chest and some of the Valley chests give Coins and can be collected every 6 hours (or four hours and thirty minutes with the Inferno Element.)
Tokens/Crates/Hoops - Islands, Boss Arenas, Training Areas, and the Duel Arena, will have coins, tokens and crates hovering around. When picked up, these give Coins or Chi. In Valley, Hoops are scattered across the sky, and occasionally on the way to another island. Some of these Hoops will give you Coins, while others will give you Chi.
Train - You train by clicking your sword and getting Ninjitsu. Next, you sell it, and earn coins.
Auto-Sell - You can also purchase an Auto-Sell boost in the shop (the icon for it is on the side of the screen) for a certain amount of time. Pairs well with Auto-Train, which will automatically train you for a certain amount of time, depending on what you bought. Auto-Train and Auto-Sell is affected by the following: Swords, Pets, Training Areas, Ranks, and certain elements located at the Altar Of Elements.
