It all depends on your mind and your beliefs in btc as a great method to earn and invest money
Bitcoin could be a source of income as long as it is existing. The signature campaigns and the other ways here in this forum on how you could earn bitcoin is the way how we are earning bitcoin = fiat if we are going to convert it and this will be the source of our income. Being active on this forum is more better than having a normal job, the salary that you are going to earn here compare to the salary that you are going to earn on the normal job do have a big difference.
But its not a good to stay in signature campaign there are many ways that you can earn bitcoin not only in signature campaign..
To me i made a business and i am affiliate members of large network that can pay in bitcoin like peerfly or cpabuild that actually gives me opportunity to earn by promoting their offers..