The number 1 mistake people are making when trying to make money online is that they enter an already saturated market. It’s very hard to penetrate there and make something.
BUT if you are starting in a new market where there is no competition you can start making a killing in less than 24hrs. IMAGINE that you started using Facebook ads FIRST or they you were around doing Email marketing 15 years ago.You would become a millionaire. Nowadays YES it’s still possible but you need to invest a lot of your time, energy and money.