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 strongly agree with your opinion, I am in bitcoin as my side job. leaving your main job and switching to bitcoin is very risky because bitcoin has a high risk for loss. but if your work is not good you should focus on bitcoin.