There are so many ways to earn online, and there's no easy way to earn all of them must put an effort to it, and all if them have their amount of risk. You can try to have a online shops and bitcoin as one of the payment method, trading has big risk and you must have the knowledge on it, investing in trusted casinos also worth it though I didn't try it yet, small offers/job in service section also can help, I will not suggest gambling as its not a way on how to earn but to lose your money. That's the only ways I know but there are plenty on it  just search in google and you can find it.