The only competing purple belt woman that I am aware of is my teammate Sara, and she already knows she can beat me any day of the week, so I don't think she's interested in competing with me anymore. Our women's Jiu-Jitsu teacher Amy is also a purple belt, but she doesn't compete. Even if she did, I would not sign up for that! I already know how it would go: Amy throws Gina and submits her in .05 seconds! It's a new world record for complete and utter domination!
So yeah, my purple belt competition options appear limited, unless I'm allowed to fight men (which I'm not opposed to, it's what I do 99% of the time in class). At one of our tournaments there were no other woman signed up, so I asked Amy if there were any smaller guys I could go against. She said "Well, there's a 14 year-old boy, but he weighs more than you." I do not want to fight boys! I'm aware that fighting dudes would put me at a disadvantage, but I'm not as vested in winning as I am in learning. However, I have been advised that it might not be safe for me, because the male ego is sometimes more willing to hurt a woman than to lose to her. I even have to deal with that kind of problem during open mat, so I know it would be much worse in competition. At that tournament when there were no women to fight, I ended up doing a match with Martìnez, and he's my dojobro, so he beat me kindly.
I'm just speculating, who knows what will happen in the future. Hopefully I won't be promoted to purple belt for a couple more years, and by then there will be lots of purples competing! Perhaps I won't even be interested in competing anymore by then. Maybe I will just pay the USJF fee and start competing in Judo instead. I might even quit martial arts entirely, you just never know.