As a Polkadot (DOT) parachain, Interlay opens a communication and interaction path between Bitcoin's native ecosystem and the broader capabilities of DeFi spaces with networks such as Ethereum (ETH) and Polkadot. Focuses on that.
It makes sense that Interlay would come to Polkadot since Interlay is on a Polkadot parachain. It’s already compatible with:
Ethereum
Kusama
Cosmos
and other chains.
Finally, Interlay states that it is currently the only decentralized option for tokenizing Bitcoin. WBTC is a fully centralized option. Keep Networks tBTC, on the other hand, is distributed, but the number of approved signatories is limited.