"The World's Easiest Cryptocurrency Textbook" COIN CATS Price: 1650 yen (tax included) Like new, only read once. No writing or wear and tear. Please understand that this item has been handled by someone else. If you are looking for a perfect item, please purchase it at the regular price from a bookstore. For those who understand that this is a used item and has been stored at home. *Please read the profile before purchasing. Bitcoin Cryptocurrency Investment Virtual Currency