I found my old screencap of the origin of the word buttcoin. During the $30 bubble, people would write bitcoin addresses on their butts and post pictures to 4chan /g/. Unfortuantly, all the recieved in return was "sent ;)"
Buttcoin
Jizz to these sluts: young and old, white and black, amateur and pro pornstars
http://imgur.com/a/Nneqv
original: http://imgur.com/a/Nneqv
littlespace
blackchickswhitedicks, reversecowgirl
blackchickswhitedicks
gonewildcurvy
gonewild
ASCII_porn
MassiveCock