Polkadot (DOT) is a network built so that many blockchains can run side by side and share one security system. The Polkadot Wiki calls it a multi-core decentralised cloud computer. Projects can run on Polkadot as rollups, also known as parachains, and tap into its shared security by buying processing capacity, called coretime, with DOT. Gavin Wood, one of the co-founders of Ethereum, started Polkadot, and the network went live in 2020.
DOT has three main roles. Holders vote on proposed changes to the protocol, including fees, inflation and upgrades. They can stake DOT to help secure the network, using a model called nominated proof of stake, in which nominators back validators they trust. And projects spend DOT on coretime.
For most of its history, DOT had no maximum supply. After a governance vote, Referendum 1710, the supply is now capped at 2.1 billion DOT, and under the stepped schedule that took effect in 2026, new issuance falls every two years as the total approaches that cap. Newly minted DOT goes to stakers and to the Polkadot treasury.
DOT is a volatile asset, and double-digit percentage moves within a single week are possible, up or down.
Official website: polkadot.com