Earning a living is possible with the bitcoin because you can gain a lot of money with the bitcoin itself, the only thing you have to do is investing in the Bitcoin and hold it.
I must say you have to spend a lot because otherwise, you would not gain a lot of profit to earn a living from it.
Agree if you are on a country in which you dont need to spend much in order for you to live your life then you can really focus on bitcoin schemes to earn some sort of amounts. Unlike if you were for example in US in which small time btc esrning is just a waste of time