It's a matter of time. Due to the fast-growing value bitcoin attracts more and more people including female.
Actually there are still a lot of people who dont know about bitcoin when bitcoin reached to some more countries so there users will also be increased in my country there are a lot of women they are using bitcoin its also a fact there are a lot of people who dont know about computer but what I believe about bitcoin its users will be increased in a very short time and women will also join bitcoin because it can change a life of them.