It's always the same with that kind of question.
If you have skills, use them. Maybe with an online job that pays you bitcoins, maybe with a real job where you earn fiat.
When you have no skills, well, it's gonna be hard. Money comes not out of nowhere.
There are a lot of people out there without any skills all wondering how they can earn money.
Those who have found a way won't tell. They don't need the competition.