There are many ways how to earn here in the crypto world, and this are the few ways how:

1.) Mining
2.) Trading
3.) Investing
4.) And also offering public service

But for me the best way to earn crypto currencies is to offer public service to those who needs people like me. My friends are now investing in some ICO's and they said it is a good idea to invest in projects here you will get double profit. So you can try investing in some ICO's because it's a legit source of in come