Full time on bitcoin sees not bad, u can choose when you want to work and how much per day, but money will be so minor first two months i guess.
It will be wise to invest all your time and effort in bitcoin world if you earn enough to sustain your daily needs. Maybe even if you don't get enough to sustain your daily needs for a short period of time and then there's a promotion coming, then it's okay to do that. It's not wise to quit your day job and stay starving your whole life.
Even if you are earning enough to survive on a daily basis, you should still put into strong consideration your savings for the future. If you have a family and kids who are about to go to school, you'd have to save up for tuition fees, allowances, school projects, and what have you. You should also consider saving and investing for retirement and insurance in case you figure in a fatal accident.