It is possible with freelance project that pays you in bitcoin like in xbtfreelancer. I have already tried some projects in there like data entry, mystery shopper, web edits and logo making. Those work pays you in moderate to high value of bitcoin. Thats like the same with earning a living in a real job.
I love freelancing work; it not only pays you and improves your skills further but you also gain experience. You can use this experience when looking for employment from better paying agencies; thats how I got my programming job and its quite well paid; almost what Ive been dreaming of.
But, before doing freelancing works, you will need the necessary skills. And also, the earning will not be stable. There will be a generous guy who pays you a lot of btc or a stingy guy that only pays you a little for you services.
If you got the skills, then it's great to do freelancing for the experience and some money.