What Are NFTs? Meet Crypto’s Digital Collectibles

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Chris Hoffman is Editor-in-Chief of How-To Geek. He’s written about technology for over a decade and was a PCWorld columnist for two years. Chris has written for The New York Times, been interviewed as a technology expert on TV stations like Miami’s NBC 6, and had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read nearly one billion times—and that’s just here at How-To Geek. Read more…
NFTs are the hot new thing in the blockchain and cryptocurrency world. Think of an NFT like a digital collector’s item. It’s a unique digital object, and NFTs are exploding in popularity. But what is an NFT?
The acronym “NFT” stands for “non-fungible token.”
An NFT is a token on a blockchain, but—unlike typical cryptocurrency—it’s not fungible. A blockchain is a secure, collaborative ledger that keeps track of who owns what.
RELATED: What Is a “Blockchain”?
When something is fungible, it’s interchangeable. For example, money is fungible. There’s no difference between one U.S. dollar and another U.S. dollar.
Gold is also considered to be a fungible commodity. One ounce of pure gold is equivalent to another ounce of pure gold. Shares of a company are fungible as well—one share of Facebook is equivalent to another share of Facebook.
Cryptocurrencies like Bitcoin are fungible, too. One bitcoin is equivalent to another bitcoin.
When something is non-fungible, it’s not interchangeable. For example, Leonardo da Vinci’s Mona Lisa is non-fungible. There is only one original copy of the Mona Lisa in the world.
A copy of a trading card is non-fungible, too. It’s a limited edition collectible. That’s what NFTs are—a sort of digital collectible.
CryptoKitties were one of the first big NFTs. Each kitty is unique. A CryptoKitty is a “digital asset” stored on a blockchain. Instead of the blockchain recording your ownership of a cryptocurrency token like Bitcoin (BTC) or Ether (ETH), it records your ownership of a specific, unique token that the kitty represents.
“Owning” a CryptoKitty works the same as “owning” a bitcoin or another cryptocurrency token. You own this digital asset because the collaborative blockchain says that you do—or rather, the blockchain says that whoever has your private keys owns it. You can use your private keys to “spend” a cryptocurrency, assigning ownership of it to someone else in return for cash or services.
Likewise, you can use your private key to assign ownership of a CryptoKitty or another NFT to someone else. Perhaps you’re exchanging the NFT for a fungible cryptocurrency (like Bitcoin), fungible cash (like U.S. dollars), or another NFT (like a different CryptoKitty). The new owner will be recorded on the blockchain.
RELATED: What the &#%$ is a CryptoKitty?
Most NFTs—CrypoKitties included—use the Ethereum blockchain. Ethereum is a cryptocurrency, but its blockchain can also store other data, like NFTs. CryptoKitties are technically ERC-721 tokens stored on the Ethereum blockchain.
Other blockchains could also implement support for NFTs.
So let’s recap: An NFT is a unique token stored on a blockchain. It’s like a bitcoin or an altcoin, but instead of being an interchangeable currency, it’s a unique digital item—in the same sense that a bitcoin is a digital item.
Let’s take a look at a few more examples of NFTs:
Those are just a few examples. There are many, many more.
You might be scratching your head and wondering what the big deal is. After all, can’t anyone take a screenshot of Jack Dorsey’s first tweet—or just read it on Twitter? Can’t anyone watch those NBA clips online—or download copies of Grimes’ videos with a quick right-click on a web page?
Well yes, of course! Someone can also take a high-resolution photo of the Mona Lisa. In fact, you can view the Mona Lisa for free in your web browser, despite the fact that the Mona Lisa is reportedly valued at nearly a billion dollars.
What you’re really paying for is a digital “certificate of authenticity” that says you are the owner of the “original” copy. The blockchain, a public ledger that records who owns what, ensures that people can’t just forge this certificate of authenticity.
When you own that first-ever copy of the first-ever Jack Dorsey tweet, the blockchain says that you do. If you sell it to someone else in the future, that person will then own it. “You know, I own the original copy of the first Jack Dorsey tweet,” they can say at cocktail parties.
Of course, it’s a little difficult to understand how a copy of a Jack Dorsey tweet is worth $2.5 million. How is that a “collectible,” and how is it worth so much money?
Well, we live in a world where Charizard cards from the Pokémon Trading Card Game can sell for more than $350,000. A copy of the Black Lotus card from Magic: The Gathering—signed by the original artist—once sold for $511,100.
But just as NFTs are bits of data on a blockchain, those trading cards are just ink on a piece of paper.
Like that signed copy of the Black Lotus card, that Jack Dorsey tweet is essentially a copy of the Jack Dorsey tweet signed by Jack Dorsey. It’s a digital copy instead of a paper copy.
Anything is worth whatever someone is willing to pay for it.
That Jack Dorsey tweet is worth $2.5 million because someone is willing to hand over that much cash for it. That person may be a big fan of Twitter and Jack Dorsey, or they may be betting that NFTs will increase in value and that people in the future will be willing to spend even more money to buy that one-of-a-kind signed tweet.
However, that collectible is one of a kind. Even if Jack Dorsey sells a thousand more copies of his tweet, the first person will always have that original, first-ever copy of the tweet. They can sell it, and whoever buys it will be recognized as the owner of the original.
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Digital Strategist Chris Hood

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