There are cross-chain blockchains. Verlux is the Cross-Chain NFT Marketplace. The idea is good because there are many NFT platforms but they must be unified and interconnected.
Now most of the NFT platforms use Ethereum blockchain and a lot of NFT is created on Ethereum.
So it is important that NFT platform will be interconnected with Ethereum blockhain.
Ethereum, as I noticed, is, in principle, the most popular in various fields, not only in NFT

That is why it is very important that blockchain or NFT marketplace will be connected with Ethereum blockchain that it will be possible to interact with Ethereum blockchain.