I also would think about it but I most likely will not do this because I already have a great job and maybe I even will turn my own company in the future in something with the bitcoin.
Its for me really depending on the market of the bitcoin and the popularity also.
You can only afford to get full time on bitcoin if you are earning higher amount of bitcoins and if the price of bitcoin is higher and stable but I don't think price stability is ever possible.
At present I really won't feel to quit my job, but if the rate of bitcoin reaches to the moon I would surely think about it, but again we don't know how long bitcoin will exist in the near future, So it is always better to play safe and have a job in our hands, earning from bitcoin is good passive income to have.
I can guarantee that most would want to quit their job after the halving prices if it stays on the real upwards of $1k minimum.
Its because people dont see enough reasonable rate to their eyes thats why..