What Is an NFT? Explained, Plus the Top NFT Sales of All Time

An NFT, short for non-fungible token, is a unique digital record on a blockchain. The record identifies one specific item and shows which wallet address holds it. The item can be a piece of digital art, a collectible card, a video clip, a game item, a ticket, a membership pass or a record linked to a physical object.

The word non-fungible means each token is distinct. A unit of Bitcoin or a dollar in a bank account is interchangeable with any other unit of the same thing. An NFT is not. Two NFTs from the same collection can have different traits, numbers and value, and the blockchain treats them as separate assets.

The key idea is that the token records ownership and history, not the item itself. Anyone can copy a JPEG or screenshot an image. What an NFT adds is a verifiable entry that says a particular wallet owns a particular token, and that the token was created or transferred in a particular way. Whether that record means anything to you depends on what the creator or platform has promised, which is why the terms attached to each NFT matter.

Most NFTs live on public blockchains such as Ethereum, Solana, Tezos, Flow or Bitcoin-based layers. An NFT is created through a smart contract, which is a program that runs on the chain. The contract sets rules for how tokens are issued, how many exist and how they can be transferred.

The main technical standards are ERC-721 and ERC-1155 on Ethereum-compatible chains. ERC-721 is used for one-of-one or unique items. ERC-1155 can handle both unique items and batches of identical items, which is common in games. Other chains use their own standards for similar purposes.

When someone mints an NFT, they submit a transaction that creates the token and links it to metadata. Metadata is usually a file that includes the name, description, image reference and attributes. Many projects store the image on a server or a decentralized file network, and the token only holds a link or hash. A transfer changes the wallet address listed as the owner. You usually need a crypto wallet to hold, send or sell an NFT, and each transaction pays a network fee.

Buying an NFT usually gives you the token and whatever rights the project grants. Those rights vary widely. Some creators grant a personal license to display the work. Others grant commercial rights. Many grant only the right to hold the token, and the artist keeps the copyright.

The token can also carry a royalty setting that asks future sellers to pay the creator a share of each resale. Royalty enforcement has changed over time. Some marketplaces stopped enforcing royalties by default, and some sales now happen without them. Do not assume a royalty will be paid on every resale.

Ownership can also be affected by the platform. If you buy on a centralized marketplace, the platform may hold a custodial wallet for you, which changes how you control the asset. A non-custodial wallet keeps control with you, but it also means you are responsible for your seed phrase and approvals.

Before you buy, read the license, the creator's terms, any utility promised, and whether the item is tied to a physical object or a membership. These details decide what you actually own.

NFTs are used for many types of items. The category tells you a lot about what the token might do, and what risks are involved.

• Digital art and generative art, often sold as single works or editions.
• Profile picture collections, known as PFP projects, where each token is a character with traits.
• Sports and entertainment highlights or collectibles, often sold in packs.
• Gaming items, such as skins, characters and land, which may be usable inside a game.
• Membership or access passes, which can unlock events, communities or pre-sales.
• Domain names and usernames, which act as readable addresses on a network.
• Tokens linked to physical items, such as graded trading cards held in a vault.

Each category has its own market. Art NFTs depend heavily on artist reputation. Gaming NFTs depend on the game staying active. Physical-backed NFTs depend on storage, grading and redemption terms. A simple way to start is to identify the category first, then read the rules for that category.

Some NFT sales drew global attention because the prices were far above anything normal collectors had paid for digital work. Several forces explain the high numbers.

First, scarcity and provenance. A token with a verifiable creator, a limited edition and a clear sale history is easy to value. Second, the artist's reputation and timing. Early-market sales by well-known digital artists attracted both art buyers and crypto buyers.

Third, the market conditions. In 2021, crypto prices were high, many buyers were new to the space, and speculation was common. Prices were often set in ether, so the dollar amount moved with the ether price on the day of sale. A sale that looks enormous in dollars may have a different meaning when the currency value is different.

Fourth, the buyer's motive. Some buyers wanted the artwork, some wanted a collectible status, and some expected resale profit. A record price does not prove that the work will hold that value. It only shows what one buyer paid at one time, under the conditions of that market.

Rankings of the most expensive NFT sales appear on several reference lists, and they change as new sales happen. The table below shows some of the most widely cited sales. It is not a complete top 10, and the figures are rounded and reported at the time of sale. Check the current lists for the latest order and any corrections.

Work	Creator or collection	Reported price	Context
The Merge	Pak	About $91.8 million	Sold in 2021 as a collection of many units
Everydays: The First 5000 Days	Beeple	$69.3 million	Sold at Christie's auction house in 2021
Human One	Beeple	$28.9 million	Listed in later ranking lists
CryptoPunk #7523	CryptoPunks	$11.75 million	Ethereum PFP sale
CryptoPunk #3100	CryptoPunks	About 4,200 ETH	Priced in ether at time of sale

The most famous records are dominated by a few artists and by CryptoPunks, one of the earliest and best-known NFT collections. Beeple's Everydays sale is widely reported as the highest-priced single work sold by a major auction house. Many other sales on the lists are CryptoPunks or other early collectibles.

Because dollar figures depend on the exchange rate when each sale happened, compare rankings with care. The sale date and currency matter as much as the headline number.

Starting with a reputable marketplace reduces the chance of a bad purchase. Marketplaces such as OpenSea, OBJKT on Tezos, SuperRare for curated Ethereum art, and Endemic for artist-led Ethereum work are examples of platforms that list NFTs from many creators. Each has its own rules, fees and focus, so read the platform's help pages before you connect a wallet.

A practical sequence looks like this:

1. Choose a wallet that you control, and back up the recovery phrase offline.
2. Confirm the marketplace's official address through a trusted source rather than a search ad or a message link.
3. Check the collection's contract address on a block explorer and compare it with the project's stated address.
4. Review the price, royalty, fees and the seller's history before approving any transaction.
5. Read every approval request. A wallet approval can give a contract permission to move tokens later.
6. Keep a record of the transaction and the license terms.

Never share a seed phrase or private key with anyone, including people who say they represent a marketplace or support team. Legitimate platforms do not ask for these details.

NFTs carry several risks that are separate from the general risks of crypto.

• Price volatility. Values can fall sharply, and a sale price may not be repeated.
• Low liquidity. Many NFTs have few buyers, so you may not find one at a fair price when you want to sell.
• Counterfeits. Copycat collections use names and images of popular projects to trick buyers.
• Phishing. Fake sites and messages ask you to connect your wallet or sign a harmful approval.
• Wash trading. Some accounts trade with themselves to make volume look high. Volume figures alone do not show real demand.
• Project failure. A game, community or utility promise can end, which can remove the value you expected.
• Platform risk. A marketplace can change fees, close or stop supporting a chain.

Defensive habits help. Verify contract addresses, avoid unsolicited links, use a separate wallet for trading, and revoke old token approvals when you no longer need them. If you are unsure, do not sign a transaction you do not understand.

Tax rules for NFT gains and losses differ by country and can be complex. Keep records of purchases, sales and fees, and speak with a qualified tax adviser if the amounts are significant.

Prices, sales volume, floor values and rankings change constantly, so an explainer should tell you where to check rather than state a figure that will soon be out of date.

For sales history, use the marketplace's activity tab for a specific collection and a blockchain explorer to confirm transactions. A block explorer shows the contract, the transfer history and the wallet addresses involved, which lets you check claims independently.

For record sales, use up-to-date reference lists and note the date and currency of each entry. Good lists explain how they measured the price, whether royalties and fees were included, and whether the sale was a single work or a batch.

For current project information, read the official website, the creator's announcements and the license or terms page. Compare these with what third parties report. If the details conflict, treat the claim as unverified.

Finally, remember that a famous sale does not guarantee that a similar NFT will hold value. The safest way to learn about NFTs is to understand the technology, the rights, the market and the risks before you spend anything.