Maybe. I am not sure if there is any girl who have been using or accepting Bitcoin through webcam site. Even if there is any, is it a big deal? Or does it really matter anyway? Anyway, bitcoin was widely use by any type or kind of people by their own preference or want on how to use their own bitcoin. Whether it is bad or not, because they are the one who is possible of whatever it takes of using it. Also, bitcoin was not only centralized to boys so I bet, girls can also use it on whatever they want. Even using it on webcam sites.