Other people love to program and love to write, so combining both of them is a good thing. Other people love to talk so a monetized Youtube channel is good for them. I you want to write and sell some courses you can do it easily - there are several platforms you can do it through.
The main idea is the best to earn money online is your own website, and it does not matter if you are writing, programming, talking or selling something. Of course, that need time and some other resources like money from you before you can earn momeny but on long term you will be winning. And, until them, you can search some websites and companies you can earn money.
