I am going to be a complete fool and say the opposite.
Starting up is easier than everyone says.<p>Reasons?
The cost is really low. You don't have to quit your job. You don't have to invest a lot into your company. If things start to do well, you can afford to do both.
What really is the cost? The cost is your time, and if it is something you enjoy, its a win-win situation.
Am I defining a hobby? Sure, but starting up can be exactly that. There are advantages to quitting your job and investing every penny you can, but that isn't for everyone.<p>So starting up is really easy. Write some code, release a project. If it doesn't do well, it was fun. If it does do well, keep the ball rolling.<p>If you can't get anything started while you are working full time, I would suggest you will be unsuccessful if you quit your job too.