It is not possible, you just need to be hard working and patient for looking a btc job. But still, if you have your daily job. You must also consider hat having it, is a very secure thing for your financial needs.
yes you also have to think about whether your country is very difficult to find a job? so do not waste when you have a job, as long as you can work on bitcoin as a task side.
The other reason is that, people who likely has that job doesn't want their job. Most people are like this, they applied for the job but they don't want the job. They just do it for sake of living.
So if I'm the one who will be asked, yes. I will do full time bitcoin job, I'm just earning to buy a desktop and will probably quit my job.
The reason?
I don't like my job, so fucking stress with the job I don't want but I need. I am more than happy to do bitcoin job because I can choose work that I like and I'm happy within...
Try to work on that you love, if earning a bitcoin is your passion and if you enjoy to work online then you should quit your job, but make sure you earn descent amount of bitcoin.