I do it because sitting at home all day gets depressing and is the only thing that is certain to be a dead end for my life in every possible way. With my new job I am at least getting out there, making progress in one way or another, getting life experiences, making an effort to improve my life. If I sit down and think about it hindsight, even a bad day at work is better than having done nothing and waking up long into the day which I'd do otherwise. I've got nothing to lose anyway.