The difference between NFTs and ordinary tokens isn’t that they’re both “on-chain assets,” but that they differ in fungibility. Any 1 $ETH is indistinguishable from any other on-chain, so yours and mine can be exchanged one for one. Each NFT has its own unique ID and attributes, so they can’t be exchanged based on quantity. That’s why NFTs are often used to represent ownership of a specific asset, such as an image, a piece of music, an in-game item, or a ticket.
This difference is most easily misunderstood before placing an order: Does an NFT also have a value calculated by “the number of units,” like $ETH ? There’s no standard price; its value depends on the market’s consensus and demand for that specific asset, and different IDs in the same collection can sell for different prices. When checking, first make sure which NFT you’re buying and what its ID and attributes are, rather than looking only at the collection name or floor price.
This difference is most easily misunderstood before placing an order: Does an NFT also have a value calculated by “the number of units,” like $ETH ? There’s no standard price; its value depends on the market’s consensus and demand for that specific asset, and different IDs in the same collection can sell for different prices. When checking, first make sure which NFT you’re buying and what its ID and attributes are, rather than looking only at the collection name or floor price.