They are not able to understand things like crypto. They just want to make cookies and stuff like that.
"They aren't business minded and aren't aware about cryptos in general." It is no doubt that most of the girls are the spenders rather than savers and they mostly spend their money on things like cosmetics, jewelry, and clothes rather than on things like cryptos, stocks, or bonds.
Not so long ago I saw a token called "Love". I think they are on the right track. You can also create a crypto currency with bows and sequins.
Maybe it's because of the rampant sexism that apparently exists in the community.
To answer the question fully, you would also need to address why there are proportionally less women in IT and computing in general.