If you are quitting your day job you should knwo for sure that you are going to make much money with teh bitcoin because if you are not making money with bitcoins you can better find a job.
you can't quit your day job if you will choose to quit just because of bitcoin then make sure that you can make more money in bitcoin that your job becoming e jobless again for nothing ? Hmm this seems that you are getting harder there are no permanent in this world.
Yeah we need to make sure that our earning from bitcoin will exceed then our full time job on regular basis, as you cannot afford to have difference in your income on monthly basis in bitcoins.
It would be still risky if you would depend from it fully because as we all know bitcoin earning and jobs here on this crypto world are not stable not the same on having a day stable job even though its a little bit smaller earning compared on bitcoin but its better on long runs.