Many legends give their valuable quotes regarding making money while sleeping and passive income, but among them my all-time favourites are -  "If you don’t find a way to make money while you sleep, you will work until you die” – Warren "The key to financial freedom and great wealth is a person’s ability or skill to convert earned income into passive income and/or portfolio income.” – Robert Kiyosaki  “Rich people choose to get paid based on results. Poor people choose to get paid based on time.” – T. Harv Eker