Bitcoin is actually becoming an alternative source of income for the unemployed remotely to make a living. It is providing part time work at home globally to all and sundry and so I agree that it's a source of income.
Yes and people who don't have job are earning good amount of bitcoins and it has become their primary source of income as I have friend in India who has quit his job and now he is full time in bitcoins and earning higher amount of income in compare to his day job and that means that he must be earning really good amount of money from bitcoins.