A non-fungible token (NFT) is a crypto token that is individually unique — each one has distinct properties, unlike fungible tokens (BTC, ETH, USDC) where every unit is interchangeable.
NFTs most commonly represent ownership of: - Digital art (PFPs, generative collections). - In-game assets (characters, weapons, land). - Real-world asset titles (property deeds, luxury goods authentication). - Memberships and access passes. - Music and media royalties.
Technically, NFTs are smart contracts implementing a token standard — ERC-721 and ERC-1155 are the Ethereum standards; Solana has its own; each major chain has equivalents. The contract maintains a mapping of token-ID to owner address.
What NFTs actually prove: ownership of the specific token-ID on the blockchain. What they don't automatically prove: copyright, physical possession of the underlying item, or unique artistic merit. Those are legal or social layers built on top of the token.
The 2021-22 NFT bubble collapsed hard — most PFP collections trade at fractions of their peak. What survives in 2026 is utility-NFT use cases (gaming, memberships, provenance) and blue-chip art collections where cultural consensus held.