Women usually like something that can be spend like CC but bitcoin are better way.
So it's quite easy to tell her about bitcoin usage , just make sure that you're also the bad side of bitcoin as well so they can able to decide on their own
not all women like to spend money. so many advantages of bitcoin, not just for transactions in spending money. on the other hand, also bitcoin will be difficult if they are used for payment transactions. because you know that not many stores accept bitcoin and still limited.
bitcoin good also for women who like to invest or make money online. making it feasible for them to know bitcoin and it would be easily enticed to use it.