Dai is a decentralized, stablecoin cryptocurrency built on the Ethereum blockchain. It is designed to maintain a stable value relative to the US Dollar, and is backed by a reserve of collateral-backed tokens and other assets. Dai is an ERC-20 token, making it fully compatible with other Ethereum-based networks and wallets. It is designed to be used as a medium of exchange, store of value, and for facilitating online payments, money transfers, and other financial services. Dai was created by MakerDAO, a decentralized autonomous organization founded in 2014 by Danish entrepreneur Rune Christensen, and was officially launched on the main Ethereum network on December 18, 2017.