Bubble
Polkadot DOT
Polkadot (DOT) was trading at $0.8429, ranked #45 by market cap at $1.43B, with 24h volume of $55.00M.
Data snapshot: 2026-07-22 18:00 UTC.
Polkadot is an interoperability-focused blockchain that connects independent, specialized chains called parachains under a shared security model, letting them communicate and exchange value with each other. It was designed by one of Ethereum's co-founders as an alternative approach to blockchain scaling through many purpose-built chains rather than one general-purpose chain. Polkadot's answer to interoperability is to have chains share security rather than bridge between it: parachains connect to a central relay chain, inherit its validator set, and can pass messages to each other without a bridge in the middle. That removes the attack surface that has caused the largest losses in crypto — bridge exploits — at the cost of requiring a slot on the relay chain. The economics of obtaining those slots have changed substantially over time, from competitive auctions to more flexible arrangements. On this map DOT sits with interoperability assets.
What is a parachain?
A chain that connects to Polkadot's relay chain, inheriting its validator security and able to exchange messages with other parachains without an external bridge.
Why does shared security matter?
Bridges between independently secured chains have been the source of some of the largest exploits in crypto. Sharing one validator set removes that particular attack surface.
How do chains obtain a slot?
Originally through competitive auctions where DOT was locked to bid. The mechanism has since moved towards more flexible arrangements for acquiring block space.
What is DOT used for?
Staking to secure the relay chain, governance, and obtaining parachain block space.
Market cap decides how big a bubble is drawn, so rank is what places DOT on the map relative to the rest of its sector.
| Rank | Coin | Market cap |
|---|---|---|
| #45 | Polkadot (DOT) | $1.43B |
| #87 | Cosmos Hub (ATOM) | $647.51M |
| #95 | Quant (QNT) | $724.69M |
| #196 | THORChain (RUNE) | $155.09M |
| #354 | Kusama (KSM) | $66.83M |