If you have a job that can be automated and worked behind a bot or something, you could potentially make money while you sleep. Now, it all depends on the business you're running. You could draw profit if you have others working for you. So you could be sleeping, while your employees are doing the work.
And there are some automated stuff, like mining bitcoin, where you could be sleeping and making bitcoin.
And there are some automated stuff, like mining bitcoin, where you could be sleeping and making bitcoin.