Bitcoin and Ethereum are two of the most popular cryptocurrencies in the world. Bitcoin was created in 2009, and Ethereum in 2015.

Bitcoin is a digital asset and a payment system, first proposed by an anonymous person or group of people under the name Satoshi Nakamoto in 2008.

Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of fraud or third party interference.

Bitcoin and Ethereum are both digital currencies, but they are different in a few ways. Bitcoin is more like a digital gold, and Ethereum is more like a digital currency. Bitcoin is used to buy things, while Ethereum is used to create contracts and to power applications. Bitcoin is deflationary, while Ethereum is inflationary.