If you Earn Much Money from Bitcoin then you will Quit from your full time job and make your own Boss and work on Bitcoin and Earn 5 time more as compare to your full time job
if I'm already comfortable working in bitcoin and have a higher income in bitcoin. why not? looking for new things it's fun mate 
but if i can get money of both of them why not..? i get salary from realjob and i can earn some bit's everyday.
so i can use bitcoin as invest and hold it, and use salary to pay cost of life....