To trade with my NFT Tokens, you need a wallet with Solana crypto.
Today I use the wallet from Phantom and the Norwegian wallet FIRI. They can trade with Solana.
If you have Solana, you can shop in certain "shops", but there are shops where, for example, you can only shop with Ethereum.
You can compare it to the fact that in Norwegian shops we trade with Norwegian money, but in Swedish shops you have to pay with Swedish money.
I have chosen to use Solsea.io as a marketplace. One of the reasons is that you have to verify that you are the owner of what you post.
The Norwegian company FIRI explains well: What is NFT?
Link to my collections at Solsea.io