it is possible to make a living using bitcoin, but it depends on the country you lived, in order to make a living in my country you need at least 0.4 a month for 1 person, and to get that amount you need some skill, you can get that by doing trading or offer your skills
Yeah, it is possible but I won't say that it would be easy, if your budget per person should be .4BTC amonth, then you would be needing a lot of focus doing that, bunches of works and lesser rest working on micro jobs. I think .2BTC is enough for a single person who don't have much debts and bills to pay but still considering the place where you live, in where I live, I could survive with just .2BTC a month. Lucky that I have a day job.