There are benefits of having a real job, however there are also negative things about it. Having a real job means having a boss. Having a boss a boss means you are inferior of him. He controls you. You're lime a slave following his orders. However, having a real job means having a salary. You don't ran out of money cause you have a monthly salary and bonuses.
About me, I have a job but I do bitcoin also. As long as you can manage your time between two, there will be no problem.