If the idea is you're working at a job solely to pay the bills because you have ambitions to do something else, if you're not actively trying to do that other thing, you've gotta make sure you're doing that. Sometimes you've gotta take away your own safety net. But if you feel miserable in a day job, in any job, get out of that. Look for something else. Stay in that job until you have the other thing set up, and then go to that other thing. But sometimes you've just got to jump out with a parachute and trust that you're going to land someplace safe.