Tell me a way to make money that would be enough.

I want to have a way to make money that can let me live in a way that would make things easier. Like something easy and on the side. Any kind of tricks that you don't wanna miss etc. I am living in my salary and need help there. Job changing is not an option for me.

I recently discovered about ton coins and the whole selling of usernames. Maybe that would be good but is it legit? Any other ways like that?