ETH is the lifeblood of Ethereum. When you send ETH or use an Ethereum application, you'll pay a small fee in ETH to use the Ethereum network. This fee is an incentive for a miner to process and verify what you're trying to do. Miners are like the record-keepers of Ethereum – they check and prove that no one is cheating. Miners who do this work are also rewarded with small amounts of newly-issued ETH. The work miners do keeps Ethereum secure and free of centralized control. In other...