It would have carried more weight if you shared the source of this finding because how do you carry out the sampling in the first place?? Btw unfortunately these are usually biased numbers as they are based on assumptions afaik!

And considering bitcoin is an internet thing, don't you think women too use men's usernames to avoid being picked on or seen as the weakling, so the numbers stack up in favour of the men , if not maybe women are less risk takers and think bitcoin is high risk to try...the same concept insurance companies use to charge higher premiums for men than women.