Earning bitcoin through these freelance job offering websites is possible. It is upto the users interest to get paid in Bitcoin or through any other form of transaction. Bitcoin has been accepted as a mode of transaction by fiverr which is similar to upwork. Later it paused the service for some reason.
We all know this thing that there are number of people from all over the world who are busy in doing online jobs on different sort of freelancing website like that of freelancer and upwork. Itis actually a very good initiative to pay the project fee in the form of crypto currency rather than that of regular currency. It will not only help the freelancers in making of good money but it will also result in more awareness amongst the people regarding it.