Pirate Chest

Pirate Chests
Along side the dock a pirates chest will appear every now and then. This Chest will contain money or piasters. The amount you get does not appear to be affected by the cash you have, but by your XP level. Somewhere in level 12 or 13 it will give you the chance to purchase piasters and it will double the money in your account for free.

To open tap on it multiple times. Zoom in as close as you can to reduce the number of taps significantly.

The Pirate chest rewards increase every level. You also have a chance of receiving one Piastre.
I'll post more as I get those levels.
 * Level 10 and below = $1,800$
 * Level 11 = $2,600
 * Level 12 = $3,400
 * Level 13 = $4,200
 * Level 14 = $5,000
 * Level 15 = $5,800
 * Level 16 = $6,800

Pirate chest appearances:

The Pirate Chest appears every 5 hours. For certain, you have somewhere between 2 - 4 hours to pick it up. If you miss your chance to pick up the chest, there is an additional nine hour wait time. So if the last chest you picked up was at 10:30pm, the next chest would be at 3:30am. If you like to sleep, and do not wake up before 7am the next morning, you will have to wait until 12:30pm to get the next one.

Once, I received what the game calls the Wonder Piastre. The wonder piastre lasts for 24 hours. Every in-app purchase for money or piastres, the amount you buy will be doubled, but for the same price. If you plan on purchasing some in-app cash, I'd strongly recommend waiting for the Wonder Piastre effect. Out of curiosity to see if it actually works, I purchased 20 piastres for 2$. The app store confirmation message will tell you you're purchasing the normal quantity of 10 piastres for 2$, but it's okay the game will double it, and I did receive 20.