Every restaurant has its own profit in the form of coins. This profit is available every four hours.
To collect your profit, go to the map and tap the profit button.

To collect profits from your restaurants:
1. Open the Tasty Hills Map
2. Select the district you want
3. Collect profits from your restaurants

The number of coins you receive depends on how many upgrades your restaurant has. The more upgrades you have, the more coins you'll get.