In the 10 years since Chris Torres created Nyan Cat, an animated flying cat with a Pop-Tart body leaving a rainbow trail, the meme has been viewed and shared across the web hundreds of millions of times. On Thursday, he put a one-of-a-kind version of it up for sale on Foundation, a website for buying and selling digital goods. In the final hour of the auction, there was a bidding war. Nyan Cat was sold to a user identified only by a cryptocurrency wallet number. The price? Roughly $580,000.