I think the best solution is do both jobs, focus on your day job and do on bitcoin too if you have free time. Is it good ? I think it's good, so we can maximum our income with bitcoin too.
I think it's hard to take both of them, you will not have time off when you come home from work. it will be very tiring if you do both. because I have experienced
You do not have to be full time on both. You should just take bitcoin as a part time job so that it only requires you to spend a little time on it. You still need to prioritize your day job if that is very time consuming and important to you. If you are trading bitcoins, you do not need to be all the time focus on it. YOu just have to take a peek once in a while. The only time it needs your full attention is when the price is moving abruptly.