if I have stable bitcoin income, let says 0.5 per day, I quit my day job and give full time on bitcoin, but as of now saving bitcoin is my first priority then learning for some bitcoin investment to get my goal in the future.
That already too big, actually. That is like more than $300 a day which would equal what others receive on a semi-monthly basis. It might be hard to come up with that earnings, unless you are into trading and you have a big capital to start with. That kind of amount would take a while to be earned if signature campaign is the only way being used.
You will have a chance to earn that doing online jobs but surely it would destroy your health the soonest, you will die within a year when are making that daily.