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 
It's like get out from your safety zone right. You are a brave man quiting your job to full time on bitcoin, because we don't know bitcoin will live forever or not. it's so risky for me.
for me Bitcoin is The best sidejob, not like other microjob , like PTC, PPC , solving captcha etc.
im save my salary arround $50-$100 permonth , and i invest arround 0.1-0.15/month in bitcoin
bitcoin indeed be the right way to add a primary income. his work also varies. rather than looking for the dollar in the PTC or microjob. get bitcoin easier.
I'm going to use bitcoin for a side job for a while. I was comfortable in a real job