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.
In my case, I'm not earning much money with bitcoin because I've just started few months ago. I still prefer to have my job rather than depending on bitcoin. We can't predict the future of bitcoin and it's risky if we entrust our future on it.
