It is possible, but only if you have the necessary skills. But I don't recommend you completely abandon official work. No one knows what will happen with bitcoin in the future. You risk to remain without money and pensions. You will agree with me it is very risky.
I agree with you, it may be possible if you have the skills, but in addition to skills are also required luck, because playing bitcoin like trading and join bounty is unpredictable, sometimes the price drops and we loss some money or bounty that we followed failed and didn't get paid, so I also recommend you to keep a regular job beside in bitcoin