For me it is a simple choice. Sure I would want to earn a living with bitcoin. But let's face it. For most of us this is a dream and will reamin a dream.
No, there is a chance that you could survive with bitcoin as a source of living...It all depends on your lifestyle and the country that you are living...But I don't think that earning a living with bitcoin is easy...Price always fluctuates..Your earnings today might not be the same as tomorrow..Sp definitely your lifestyle with that would mean very simple so that you could survive the fluctuation..
Its possible but it would take you a lot of time and I think you have to say goodbye to your normal job because otherwise its not possible for sure.
Indeed, it also depends on how you life and how much you earned with your normal job, I think its possible if you have planned it very good and also already have some money to survive sometimes.
If you have skill like if you are a developer then you can earn a living with bitcoin but for a normal person its impossible for that to happen having a normal job is still the best.