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Ethereum (ETH) is an open-source platform that allows anyone to create a project based on the Ethereum blockchain that reliably executes whatever code it was designed with. Many other cryptocurrencies are built on the Ethereum blockchain, making this cryptocurrency one of the most widely-used tokens available.
ETH was built with a global Internet in mind, and functions as a middleman for various projects and individuals around the world. Created in 2015, ETH has quickly become one of the largest programmable blockchains on the planet.