I advise you don't quit your corrent job for bitcoin. I think you should rather be doing both jobs simultaneously. You can even also be investing your earnings in bitcoins.
Yes you can quit your day job because there are a lot of ways to earn from bitcoin some of them need full time to earn and some of them need little time Im also doing study and Im doing bitcoin and believe me it dont disturbed my life because its the only currency which is also doing something great and a lot of people they have quit day jobs just because of bitcoin because they are earning much more than their day job.