There is something i do not understand about Polkadot.
Can we say Polkadot is a sidechain of Ethereum ? Or is it contestant of Ethereum ?
Is it correct to say "Polkadot is not a Layer 2 of Ethereum but a Layer 1 sidechain" ?
Thanks
PolkaDot Brings Multiple Blockchains into One Network by Unlocking Scalability and Extensibility
Polkadot is not a sidechain of Ethereum. Polkadot is basically an ecosystem for cross-chain communication. It has parachains like sidechains in Ethereum but in Polkadot, the main chain is a relay chain.
Moreover, In the parachain the ethereum chain can also be included as well as many other blockchains.