Polkadot is a smart contract blockchain prioritizing decentralization, speed, and security in pursuit of Web3. Unlike Ethereum, Polkadot is designed as a web of standalone blockchains connected to a relay chain .
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Polkadot is a protocol that connects blockchains — allowing value and data to be sent across previously incompatible networks (Bitcoin and Ethereum, for example). It’s also designed to be fast and scalable. The DOT token is used for staking and governance ; it can be bought or sold on Coinbase and other exchanges.
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