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A non-fungible token (NFT) is a special type of cryptographic token which represents something unique; NFTs are thus not mutually interchangeable. This is in contrast to cryptocurrencies like bitcoin, and many network or utility tokens, that are fungible in nature.

Applications

Non-fungible tokens are used to create verifiable artificial scarcity in the digital domain, as well as digital ownership, and the possibility of asset interoperability across multiple platforms. NFTs are used in several specific applications that require unique digital items like crypto art, digital collectibles, and online gaming.

Art was an early use case for NFTs, and blockchain in general, because of the ability of NFTs to provide proof of authenticity and ownership of digital art, a medium that designed for ease of mass reproduction, and unauthorized distribution through the Internet.

NFTs can also be used to represent in-game assets which are controlled by the user instead of the game developer. NFTs allow assets to be traded on third-party marketplaces without permission from the game developer.

Growth and mainstream appeal

This section documents a current event. Information may change rapidly as the event progresses, and initial news reports may be unreliable. The latest updates to this section may not reflect the most current information. Feel free to improve this section or discuss changes on the talk page, but please note that updates without valid and reliable references will be removed. (March 2021) (Learn how and when to remove this message)

In June 2017 CryptoPunks were released as the first non-fungible tokens on the Ethereum blockchain by American studio Larva Labs, a two-person team consisting of Matt Hall and John Watkinson. In late 2017 another project called CryptoKitties was released and went viral and subsequently raised a $12.5 million investment.

In 2018, RareBits, a NFT marketplace and exchange, raised a $6 million investment. Gamedex, a collectible cards game platform made possible by NFTs, raised a $800,000 seed round. Decentraland, a blockchain-based virtual world, raised $26 million in an initial coin offering, and had a $20 million internal economy as of September 2018. As of 2019, Nike holds a patent for its blockchain-based NFT-sneakers called ‘CryptoKicks’.

Dapper Labs, in partnership with the NBA, launched a beta version of their NBA TopShot collectable and tradable NFT-based app in the first half of 2020, which they had been working on since 2018. It sells tokens in packs which they say contain multimedia and data smashed together. On October 1, 2020, it was announced that they had exited the beta and opened to all fans. As of February 28, 2021, Dapper Labs was reporting over $230 million in gross sales in the app.

In February 2021, the musician Grimes sold around $6 million worth of digital art on Nifty Gateway. Later in February, the meme animation Nyan Cat had been sold on an internet market place for just under US$600,000. A few days later, American digital artist Beeple's work "Everydays" was the first NFT artwork to be listed at prominent auction house Christie's.

The first full album to enter auction as an NFT is Whale Shark by Clarian North, which was released on March 4, 2021. Kings of Leon's album When You See Yourself, released on March 5, 2021, had been planned to be the first musical album sold with NFT versions.

Ethereum token standards

Specific token standards have been created to support the use of a blockchain in gaming. These include the Ethereum ERC-721 standard of CryptoKitties, and the more recent ERC-1155 standard.

ERC-721 Non-Fungible Token Standard

ERC-721 was the first standard for representing non-fungible digital assets. ERC-721 is an inheritable Solidity smart contract standard, meaning that developers can easily create new ERC-721-compliant contracts by importing it from the OpenZeppelin library.

ERC-1155 Multi Token Standard

ERC-1155 brings the idea of "semi-fungibility" to the NFT world, as well as providing a superset of ERC-721 functionality (meaning that an ERC-721 asset could be built using ERC-1155).

Further reading

• The Story Behind Hashmasks: Ethereum’s Greatest Art Sale

Notes

1. Network tokens are used to identify and validate payments over card networks, made with a specific merchant. Utility tokens are a type of cryptocurrency that represent access or discount to a product or service.

References

1. Merriam Webster Definition
2. Schroeder, Stan. "Crypto trading card game 'Gods Unchained' looks pretty sweet in first gameplay trailer". Mashable. Retrieved 2018-11-18.
3. "Enjin is Creating a Real-Life Ready Player One, and It's Powered by Blockchain". VentureBeat. 2019-04-16. Retrieved 2019-08-14.
4. "The Art World Needs Blockchain – Irish Tech News". irishtechnews.ie. Retrieved 2018-05-02.
5. "CryptoKitties shows everything can — and will — be tokenized". VentureBeat. 2017-12-04. Retrieved 2018-05-02.
6. "This ethereum-based project could change how we think about digital art". Mashable.com. Retrieved 2017-06-16.
7. Wong, Joon Ian. "CryptoKitties is jamming up the ethereum network". Quartz. Retrieved 2018-05-10.
8. "CryptoKitties Mania Overwhelms Ethereum Network's Processing". Bloomberg.com. 2017-12-04. Retrieved 2018-05-10.
9. "CryptoKitties raises $12M from Andreessen Horowitz and Union Square Ventures – TechCrunch". techcrunch.com. Retrieved 2018-05-07.
10. "Crypto-collectibles and Kitties marketplace Rare Bits raises $6M – TechCrunch". techcrunch.com. Retrieved 2018-05-07.
11. "Blockchain startup Gamedex raises $0.8 million seed round to build platform for digital collectible card games like Pokemon – TechStartups". techstartups.com. Retrieved 2018-05-07.
12. Russo, Camilla (2018-06-12). "Making a Killing in Virtual Real Estate". Bloomberg. Retrieved 2018-09-05.
13. Hankin, Aaron (2018-09-04). "People are making more than 500% buying property that doesn't actually exist". MarketWatch. Retrieved 2018-09-05.
14. Beedham, Matthew (2019-12-10). "Nike now holds patent for blockchain-based sneakers called 'CryptoKicks'". Hard Fork | The Next Web. Retrieved 2020-12-23.
15. Shieber, Jonathan (27 May 2020). "CryptoKitties developer launches NBA TopShot, a new blockchain-based collectible collab with the NBA – TechCrunch". TechCrunch. Retrieved 4 March 2021.
16. Labs, Dapper (1 October 2020). "Dapper Labs Opens NBA Top Shot Beta to All Fans". PR Newswire. Retrieved 4 March 2021.
17. Young, Jabari (28 February 2021). "People have spent more than $230 million buying and trading digital collectibles of NBA highlights". CNBC. Retrieved 4 March 2021.
18. Kastrenakes, Jacob (2021-03-01). "Grimes sold $6 million worth of digital art as NFTs". The Verge. Retrieved 2021-03-04.
19. "Why an Animated Flying Cat With a Pop-Tart Body Sold for Almost $600,000". NY Times. 2021-02-25. Retrieved 2021-02-28.
20. "Beeple Brings Crypto to Christie's". NY Times. 2021-02-25. Retrieved 2021-02-25.
21. Robin Murray (March 5, 2021) Wait. Did Clarian Beat Kings Of Leon's NFT Record? Clash Magazine.
22. Samantha Hissong (March 3, 2021). "Kings of Leon Will Be the First Band to Release an Album as an NFT". Rolling Stone.
23. "NFT meaning explained as Kings of Leon offer music industry first". Newsweek. 2021-03-05. Retrieved 2021-03-09.
24. Volpicelli, Gian (24 February 2021). "The bitcoin elite are spending millions on collectable memes". Wired UK.
25. "EIP-721: ERC-721 Non-Fungible Token Standard". Ethereum Improvement Proposals. Retrieved 2021-02-28.
26. "EIP-1155: ERC-1155 Multi Token Standard". Ethereum Improvement Proposals. Retrieved 2021-02-28.

External links

• ERC-721 Standard

• Current events from March 2021
• Blockchain games
• Cryptocurrencies
• Ethereum