you do not need to worry if you are cant using bitcoin wherever, simple you just exchange it to fiat money and you can use what you want.
Like in our country you can exchange it almost instantly. And you can withdraw it in an atm. So you do not need to worry about how or where you can use bitcoin. You should consider if you have enough bitcoin opportunities to earn more than your day job. If you earn less or just as much amount of money as your day job, don't quit. Just use bitcoin as an extra income.
it's good idea for make bitcoin as side job, as an extra income. im use it too . i have real job and im earning some amount from bitcoin so i get 2 salary. but sometimes im booring with my realjob, i have plan to quit my realjob and focus at bitcoin, hope i can do it in next year.