To correct you first on the title you're using, why not change the word girls to "women" to make it more professional, secondly incase you don't know, then try to get this noted that women were very good at keeping secrets than men, you can conduct a research on that, so I believe in keeping private keys in a secured manner, women will be a very good consideration at that, we also have women active in the cryptocurrency world but just few and from those few, little number of them were recognized, just take a look at the forum here as a reference.