If the millions of dollars invested in bitcoin could see this, I'm afraid of what they might think.
Bitcoins are bitcoins, not used panty..things.
Yes, this is a common fetish in Japan. There are two vending machines like this near where I used to live.
FWIW this gives me an idea. I could sell my wife's panties online too. I just asked her. When I told her she could get $80 for them she said "Really?"
I asked her again and she said "No! Don't be sick, Don't ask me for that, but if they want my socks it's okay".