They would BECOME the currency. Or be traded, or beg to be part of a rich guy or local war-lord's harem in such a predicament.
Sorry, I got bored last night and looked in on /pol/. In between watching horrific vid clips of a soulless Chinese society with no mercy and not even a semblance of an OSHA,all via endless social credit security cams, I nevertheless came across an interesting thread about the topic of women and their likely future roles, should a society collapse or be invaded, as dictated by millennia of past history.
It was rather fascinating, despite the usual sado-masochists and all the other usual fare that can be somewhat amusing in its debaucherous views. There is Truth between the lines.
I have mixed feelings about that place, given it stole my innocence long ago and dilated my world-view anus:/ I don't peak in very often anymore.
Hopefully, the attractive ones will invest in bitcoin so they have some leverage after the collapse. Sounds legit.