In my point of view its not a very good thing to leave your present job and get focusing more on bitcoin rather prefer both.
i will give you my example because when i start bitcoin so at that time i was using bitcoin part time and my day job was full time but its very clear that my income was very high then my day job so then i decided to quit my day job and i start bitcoin full time now i have a lot of money and i start my own business just because of bitcoin.