Just tell them, "hey babe, I've got something for you, but this is an online money and you can only cash it out by exchanging it. And after we converted to real money, we now have our date and buy anything what you want."
First you need to tell her how to earn it, spending is very easy and doesn't require any efforts but to earn it requires great level of dedication.
But why? Not a personal attack, more a thought point, but why would anyone, male or female, predilect for a type of money they can only spend at select locations, or have to utilize an exchange to convert to USD? In a USD society (Merica) ultimately all bitcoin will be appropriated or value pegged to USD. Hence, infinitely easier to just use USD in the first place. Most people could give a good god damn about where the money came from, just that they possess it and have the permission to spend it as they chose. Females will start using bitcoin when companies start marketing products that females use
it's certainly not miners or bullion.Unless we melt that bullion into some fashion jewelry..