There are outsourcing companies that earn by monthly commission on the workers that they provided to big companies. That kind of income can be considered passive that you are earning even if you are not doing anything. However, it is not easy to setup a company like that.It is possible to make money while you are sleeping provided you setup the business right. Outsourcing is the main thing you need to master before you can make money while you are sleeping. It means you have hire the right people to run your business for you and make money on autopilot.