If 79% of the attendees are men, then 21% must be woman, that's for me already a high number, and shows that more females have found out that crypto gives a fantastic investment opportunity and if they want and has the skills also a great carrier opportunity!
Slowly but steadily the ratio of females are now increasing and this is a good sign as well as more and more community members are getting aware and even female participation means that it is not going to be dominant by the males forever.