This koi was made out of an American $20 and was part of a school of koi that were a gift my grandmother had asked me to fold for my cousin. Each one took about 2 hours to fold but I think I could have folded them faster if I wasn’t being so cautious to get them perfect.
I really enjoy dollar bill origami because it makes for interesting gifts. I also enjoy seeing a waiter face when I leave some as a tip at a restaurant. The way their face moves from amazement to confusion over whether they should/can unfold it.