Bitcoin vs Dogecoin are both popular cryptocurrencies, but they serve different purposes. Bitcoin, created in 2009 by Satoshi Nakamoto, is considered the first and most valuable digital currency. It was designed as a decentralized alternative to traditional money, with a limited supply of 21 million coins. Dogecoin, on the other hand, started as a meme in 2013 but gained traction due to its active community and fast transactions. Unlike Bitcoin, Dogecoin has no supply cap, making it more inflationary. While Bitcoin is seen as a store of value, Dogecoin is often used for tipping and microtransactions.