Earning a living with bitcoin has got higher possibility. The reason is that bitcoin gives low earning but several methods of earning method is available. If the user involve in most of the earning method then sufficient amount for an living can be earned.
For the easier work you will get lower payments in bitcoin and also in any fiat. For your skill based works you will get paid up to your demand. I am also moving towards to make a living from bitcoin as I believe saving bitcoin will enable me to retire some 10 years before itself.
Only those who owned bitcoin company/sites can nake a living for bitcoin because they are the one who can earn big money with bitcoin but if the person is just a simple investor or a hopper well you cannot earn a living with it and you cannot relay on bitcoin because the earnings in bitcoin is just for earnings.