IMO I consider bitcoin as my best extra source of income, there's a lot of uses bitcoin can do in our life, as a user of bitcoin i used it to pay bills, buy medicine and foods, send money to someone special, then most important is i used it as my daily mobile load provider. So many uses and I am proud to be one of bitcoiners.
It always be a good source of extra income in every month because has a lots of users now a days because they knew how they money works in this currencies and the can really use it into another acitivities like using it from shopping buying digital goods using bitcoin they can also provide there daily needs in bitcoin i use bitcoin for some reason to pay bills also.