To motivate women to use bitcoin or get involved is to first to know what women really want. If you will be able to know what this women usually liked and dislikes or should I say this also depends upon the person. What makes them happy and excite will first amazed women to join and be part of it..
Every woman is different on the first place and if you are pulling them into crypto cause they could get some benefits, discounts or excitement then it is a complete waste.It is not motivation but bribing.
but you must also provide the way of its earning to them as for spending it always need to earn.
I think there is an app for that purpose.Whenever you buy something the app saves the change to buy bitcoins or something similar.