NFTs are related to cryptocurrencies because they are recorded on a blockchain ledger that shows a public record of the NFT’s ownership. While blockchain has very secure protocols, it’s always best to take some extra steps to have the best security when trading NFTs. Most NFTs are built on the Ethereum network, which has NFT capabilities through the Ethereum ERC-721 standard. When you buy, make, and sell NFTs on an NFT marketplace, you’ll also need to make payments in cryptocurrency.