Dogecoin (pronounced DOHJ-coin) isn't something tangible like the dollar bills in your wallet. It's an open source file-sharing form of cryptocurrency that was created by programmer Billy Markus in December 2013. The newbie cryptocurrency started off as a parody of Bitcoin, using the image of a perplexed Japanese dog. Chances are, you've probably seen Dogecoin's mascot somewhere on the Internet already. As the Shiba Inu would say: Wow, much coin-cidence.