Yes, many peoples are choosing bitcoins for their source of income.Earning money through bitcoin is morethan earn on a normal job. so many peoples are leaving job and doing earning bitcoins their own ways.
Many people? There's no many people.
As far as we know, Bitcoin is not really known by many, you could say few. But the thing is, yes they've heard about Bitcoin and that's it, they just don't know what Bitcoin really is.
Well they only leave their jobs because that job doesn't pay that much, but if their job pays more then, they will not migrate to Bitcoin.
Yes its true that if their job is paying good they will not leave it for bitcoin. But how about even though their job is paying that much they will be able to leave that because in bitcoin you can work at your comfort zone like waking up in the morning doing some services by bitcoin without taking a bath nor brushing your teeth, without changing clothes. Sounds lazy but much more comfortable especially no bossy boss, no traffic and no hassle.