OP is aim at women in crypto trading, but why not in women in crypto general? Because at the end of his post is link which is related to some new crypto-exchange he / she is promoting.
No one forbids women to buy or to trade with cryptocurrency, it is just their choice. Why this is mainly man area so far, can only be the subject of the research, but no one should be forced to do something if he / she is not interested in it. Implying that women are not smart enough to understand cryptocurrency is underestimation of womans, they are or they can be excellent traders, but probably they should use some more trusted platforms.
For start that crypto exchange you promote should have more then 25% of womens in team, if we want equality we should show it on its own example.
I think the op made the wrong choice of word to have used slow for them, the fact that they picked little or no interest does not mean that they are slow in learning, if we check this forum, we can also see that there is little participation of women in the forum, but if you eventually get a lady to comment, you will get a very intelligent response and the most constructive post from them.
I think that cryptocurrency does not really have what it takes to attract women to itself, if it was for making payment, I am sure many of them would have probably been using it to make payment for one or two of their personal needs, but for now, the crypto market has been turned to an investment market which many of them would not want to take such risk.