My friend has been trying himself to be a copywriter, but after 3 months he gave up because it was really exhausting.

Was it the right move to quit in copywriting career?

The same can be said for most online careers, link building careers are also very similar, people start doing it and then notice how many other people are doing the same thing in the industry so the demand is very high and too much competition so they have to drop their rates.

Thanks Daniel for your advice. We'll, I keep telling my friend not to quit copywriting because I know it's his passion, not for money. But still, he's not yet ready to go back in copywriting because he's finding new ways to make money. For me, I could have almost quitted link building because no one wants to hire me. 

Still, fight goes on.