What is an NFT? Non-Fungible Token Guide
An NFT (Non-Fungible Token) is a unique blockchain-based asset that proves ownership of digital or physical items like art, collectibles, and game assets.
What is an NFT?
An NFT (Non-Fungible Token) is a unique digital asset stored on a blockchain whose ownership and provenance can be verified cryptographically. Unlike fungible tokens like Bitcoin or USDC — where every unit is interchangeable — each NFT has distinct attributes that make it one-of-a-kind. NFTs are used to represent ownership of digital art, collectibles, in-game items, music, virtual real estate, identity credentials, and tokenized real-world assets.
The most common standard for NFTs is ERC-721 on Ethereum, with ERC-1155 supporting both fungible and non-fungible tokens within a single contract. NFTs have spawned multi-billion dollar markets, with platforms like OpenSea, Blur, and Magic Eden facilitating millions of trades.
How Does It Work?
The NFT lifecycle typically follows these steps:
1. Creation (minting): An artist or project deploys a smart contract that defines the NFT collection, then mints individual tokens (each with unique metadata). 2. Metadata: Stored either on-chain (rare, expensive) or via decentralized storage like IPFS (common). 3. Listing: NFTs appear on marketplaces where buyers can browse and purchase. 4. Transfer: When sold, ownership transfers to the buyer's wallet via smart contract execution. 5. Royalties (optional): Original creators can earn a percentage of future secondary sales.
NFT metadata typically includes images, attributes/traits, descriptions, and links to associated content. Provenance — the on-chain history of every transfer — is permanently visible to anyone.
History and Evolution
NFT precursors date back to Colored Coins on Bitcoin (2012) and Counterparty projects like Spells of Genesis. The first widely-recognized NFT was CryptoPunks, launched on Ethereum in June 2017 by Larva Labs. CryptoKitties in November 2017 popularized NFTs and famously congested Ethereum.
The 2021 NFT boom catapulted NFTs into mainstream culture. Beeple's "Everydays" sold for $69 million at Christie's in March 2021. The Bored Ape Yacht Club, Doodles, Azuki, and Art Blocks generated massive volumes. NBA Top Shot demonstrated mass-market potential. Total NFT volume in 2021 exceeded $25 billion.
The 2022-2023 bear market saw NFT volumes collapse 95%+ from peak. Survivors consolidated, and the focus shifted to NFTs as functional infrastructure: gaming items (Sky Mavis, Axie), domain names (ENS), identity (Soulbound tokens), and tickets. By 2024-2025, NFT activity is more pragmatic and use-case driven, with notable revivals around AI-generated art, music NFTs, and tokenized real-world assets.
Key Concepts
- ERC-721 vs ERC-1155: Two main NFT standards on Ethereum. - Floor price: The cheapest NFT available in a given collection. - Royalties: Creator earnings on secondary sales (controversial enforcement). - Provenance: Verifiable on-chain history of every NFT transfer.
Practical Example
A digital artist mints a 1,000-piece generative art collection on Ethereum, with each NFT minted at 0.1 ETH (~$300 each). The collection sells out, generating 100 ETH (~$300,000) in primary sales. Six months later, the collection's floor price reaches 1.5 ETH, and the artist receives 5% royalties on every secondary sale. By the end of the year, total trading volume in the collection has reached 5,000 ETH, and the artist has earned an additional 250 ETH in royalties (~$750,000 at current prices). This combination of primary sales and ongoing royalties is one of the most powerful artist-monetization models that NFTs have enabled.