{"id":"changhyun-cho","hidden":false,"ipfs":"QmVUWK5ytiWhfhk6fwzaayJmuSi4TAFSxQ6au1fJhc7yvT","language":"en","transactionHash":"0x9e81403d5887f480e0b93eeaf4df1d9f27a00f13f23e69c193879906e859be7b","created":"2026-08-28T12:18:29.692Z","updated":"2026-08-28T12:18:29.692Z","title":"Changhyun Cho","summary":"Changhyun Cho is a South Korean executive and founder, best known as CEO of blockchain marketing startup 1Self.World and for prior leadership roles at FSN, FSN ASIA, and A.T. Kearney.","content":"**Changhyun Cho** (also transliterated Cho Chang-hyun) is the chief executive officer of 1Self.[World](https://iq.wiki/wiki/world) Inc., a Seoul-based [blockchain](https://iq.wiki/wiki/blockchain) technology startup he has led since May 2023.[[1]](#cite-id-i3hecq518u)​[[2]](#cite-id-peagwlkk5n) His career spans management consulting, internet and mobile marketing, and the [blockchain](https://iq.wiki/wiki/blockchain) industry, with prior leadership roles at the digital marketing group FSN and its regional arm FSN ASIA, and a partnership at the consulting firm A.T. Kearney.[[1]](#cite-id-i3hecq518u)​\n\n## Early Life and Education\nCho holds a Bachelor of Arts in Economics from Seoul National University, which he attended between 1995 and 2001.[[1]](#cite-id-i3hecq518u)[[2]](#cite-id-peagwlkk5n) He is based in Seoul, South Korea.[[2]](#cite-id-peagwlkk5n)\n\n## Early Career\nCho began his career in the entertainment and investment sectors before moving into consulting. From February 2002 to May 2004 he was a marketing manager at Noon Entertainment Co., Ltd. in Seoul, where he reports developing film synopses and scripts, managing production, and securing seed funding from investors, which served as the basis for later work with [blockchain](https://iq.wiki/wiki/blockchain).[[1]](#cite-id-i3hecq518u) He then joined Withus Investment Co., Ltd. as an investment manager from May 2004 to May 2006, initiating equity-based investments in content companies and executing investments in more than ten film projects.[[1]](#cite-id-i3hecq518u)​\n\nFrom May 2006 to October 2009 he was an associate manager at Nemo Partners SCG, a management consulting firm in the Gangnam district of Seoul, where he reports being recognized internally as an expert in mergers and acquisitions and conducting due diligence and market-entry engagements.[[1]](#cite-id-i3hecq518u)​[[2]](#cite-id-peagwlkk5n) He subsequently spent nearly six years at A.T. Kearney (Kearney), also in Gangnam-gu, as a partner and leader of the firm's Communications, Media and Technology (CMT) practice from November 2009 to August 2015.[[1]](#cite-id-i3hecq518u) In that role he reports more than twenty due diligence and post-merger integration engagements and more than twenty new-business and market-entry strategy projects across telecommunications, media, technology, semiconductors, automotive, and healthcare, working with private equity funds and multinational companies.[[1]](#cite-id-i3hecq518u)​\n\n## FSN and FSN ASIA\nBetween 2015 and 2022 Cho held concurrent senior roles at FSN, a KOSDAQ-listed advertising technology group, and its regional subsidiary FSN ASIA. From September 2015 to November 2022 he served as a board member and CEO of FSN's Global & Innovative Group, based in Gangnam-gu, Seoul.[[1]](#cite-id-i3hecq518u) He reports leading FSN's initial public offering on the Korean stock market, describing the company on his LinkedIn profile as what he calls the first ad-tech company listed on KOSDAQ, and overseeing its principal business CAULY, which he characterizes there as Korea's leading mobile advertising network.[[1]](#cite-id-i3hecq518u)​\n\nFrom September 2015 to December 2022 he was CEO of FSN ASIA, based in Singapore, a digital marketing and [blockchain](https://iq.wiki/wiki/blockchain) company operating across Korea, China, Taiwan, Singapore, Thailand, Indonesia, Vietnam, and Laos.[[1]](#cite-id-i3hecq518u)​[[2]](#cite-id-peagwlkk5n) He reports leading the group's overseas business across those markets, developing advertising products including a retargeting product and a lockscreen advertising platform called ADPOCKET, and acquiring or building more than ten companies across Korea, China, and Southeast Asia while managing M\\&A and legal and financial affairs.[[1]](#cite-id-i3hecq518u) He states that FSN ASIA's Vietnamese subsidiary, Clever Group, is listed on the Ho Chi Minh Stock Exchange.[[1]](#cite-id-i3hecq518u)​\n\nDuring his time at FSN ASIA, Cho also directed the group's early [blockchain](https://iq.wiki/wiki/blockchain) and [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) ventures. He reports managing the SIX Network [initial coin offering (ICO)](https://iq.wiki/wiki/initial-coin-offering) and launching a digital intellectual-property management service called ECHO, which he says stored more than two million digital contents on a [blockchain](https://iq.wiki/wiki/blockchain) network.[[1]](#cite-id-i3hecq518u) He further states that he helped establish the [decentralized finance (DeFi)](https://iq.wiki/wiki/defi) platform Definix, which he describes as an official DeFi partner of the [Klaytn](https://iq.wiki/wiki/klaytn) blockchain.[[1]](#cite-id-i3hecq518u)​\n\n## 1Self.World\n\nCho founded and has led 1Self.[World](https://iq.wiki/wiki/world) Inc. (also styled 1SW, and rendered in English coverage as OneSelf.World) since May 2023.[[1]](#cite-id-i3hecq518u)​[[3]](#cite-id-wfxurxyv5m) The company is a [Web3](https://iq.wiki/wiki/web3) [blockchain](https://iq.wiki/wiki/blockchain) technology startup headquartered in South Korea and founded in 2023, and it positions itself as a bridge between Web 3.0 and Web 2.0.[[1]](#cite-id-i3hecq518u) Its stated purpose is to let individuals own the data that platforms currently monopolize, so that users and advertisers can connect directly and inefficiencies in the advertising and marketing market are reduced; the company says it uses Web 3.0 technology and Soulbound Tokens (SBTs) — non-transferable, wallet-bound tokens used to represent identity and attributes — to do so.[[3]](#cite-id-wfxurxyv5m) The firm reports a size of one to ten employees.[[3]](#cite-id-wfxurxyv5m)​\n\n### MyB and W3ID\n\nThe company's core product is MyB, a [digital asset](https://iq.wiki/wiki/digital-assets) wallet that Cho describes as a \"[Blockchain](https://iq.wiki/wiki/blockchain) Wallet-Based Marketing Platform.\" He states MyB reached one million downloads within its first year of launch.[[1]](#cite-id-i3hecq518u) The wallet is paired with MyB AdChain, an artificial-intelligence and [blockchain](https://iq.wiki/wiki/blockchain) reward advertising network.[[1]](#cite-id-i3hecq518u) Cho has summarized the company's product philosophy with the phrase \"지갑을 만들기보다, 먼저 쓰이게 하자\" (\"rather than building a wallet, first make it used\"), and describes 1Self.[World](https://iq.wiki/wiki/world) as offering \"a [Web3](https://iq.wiki/wiki/web3) service that users actually use,\" attributing user growth to what he calls a \"blockchain-hidden\" approach that keeps the underlying technology invisible to end users.[[1]](#cite-id-i3hecq518u)​\n\nUnderlying the platform is a patented technology the company calls Web 3.0 Identity (W3ID). Cho states that 1Self.World registered a patent for W3ID and presents it as a practical alternative to Know Your Wallet (KYW), the practice of identifying and understanding the entity behind a blockchain wallet.[[1]](#cite-id-i3hecq518u) Reporting on the company describes W3ID as an on-chain database technology that identifies and analyzes users by combining [digital asset](https://iq.wiki/wiki/digital-assets) [wallet](https://iq.wiki/wiki/cryptocurrency-wallet) addresses with SBT attribute data, and states that W3ID has completed domestic patent registration in Korea and passed U.S. patent examination.[[4]](#cite-id-8lks05t6j7)​\n\n### Funding\n1Self.[World](https://iq.wiki/wiki/world) has reported raising multiple Pre-Series A funding rounds. In its Pre-Series A round the company secured approximately USD 1.1 million (KRW 1.5 billion) from Crit Ventures. Cho said the capital would enhance the platform's machine-learning-based recommendation engine, further develop AI-driven quiz events for MyB, and support expansion into the ad network business so that the company's identifier technology could be used across other mobile platforms.[[5]](#cite-id-5lqzastai5) The company later raised a further approximately USD 1.5 million (KRW 2 billion) in a Pre-Series A bridge round, also from Crit Ventures, to continue developing its AI- and blockchain-based advertising platform and to support domestic and global expansion plans centered on MyB and MyB AdChain.[[6]](#cite-id-f88j9lcae3) In later funding communications Cho described the platform as combining AI with data-reliability technology, stating: \"Our innovative advertising platform that combines AI with data reliability technologies can become a new standard for the global mobile ecosystem. With this funding, we will accelerate global expansion and business model diversification.\"[[6]](#cite-id-f88j9lcae3)​\n\n### Growth and Operational Milestones\n[Across](https://iq.wiki/wiki/across) 2025 and 2026 Cho has reported steady growth in users, wallet activity, and issued Soulbound Tokens for 1Self.[World](https://iq.wiki/wiki/world)'s services. In LinkedIn posts he described the platform as reaching around one million wallets and tens of millions of SBTs within roughly a year of launch, followed by further increases in user numbers and revenue through early 2026, including what he characterized as a many-fold year-on-year revenue increase.[[1]](#cite-id-i3hecq518u)​\n\nReporting on the company's first-half 2026 performance stated that its sales tripled year-on-year and that average monthly sales in the second quarter exceeded one billion won, with the company projecting 20 billion won in annual sales if the trend continued. That coverage attributed the growth to the MyB wallet and MyB Ad Chain, which it said together had six million wallet users and 77 million cumulative SBTs, and reported that the company had been selected over six competing ad-tech firms by a leading Korean internet bank and had confirmed a linkage with a global K-pop fandom platform.[[4]](#cite-id-8lks05t6j7) Cho framed the results as evidence of the wallet-as-data-platform model, stating: \"The average monthly sales of KRW 1 billion in the second quarter is an indicator that wallet-based user data is leading to actual sales,\" and \"We will make the direction of wallet as a platform where data is generated, not a simple payment method, into a real business.\"[[4]](#cite-id-8lks05t6j7)​\n\n### Partnerships and New Initiatives\n\n1Self.[World](https://iq.wiki/wiki/world) has pursued [blockchain](https://iq.wiki/wiki/blockchain) infrastructure and financial partnerships alongside its advertising business. In September 2025 Cho reported that the company joined the [XPLA](https://iq.wiki/wiki/xpla) [mainnet](https://iq.wiki/wiki/mainnet) as a [node](https://iq.wiki/wiki/node) [validator](https://iq.wiki/wiki/validator), a role in which an operator helps confirm transactions and secure the [blockchain](https://iq.wiki/wiki/blockchain) network.[[1]](#cite-id-i3hecq518u) In December 2025 he reported that the company signed a memorandum of understanding with the payments firm KSNet for a pilot combining a Korean-won [stablecoin](https://iq.wiki/wiki/stablecoin) with payments and rewards.[[1]](#cite-id-i3hecq518u) Cho has also stated that 1Self.World is developing a Security Token Offering (STO) business model in cooperation with large financial institutions and customer platforms.[[1]](#cite-id-i3hecq518u)​\n\nThe company has strengthened its leadership to support these initiatives. In May 2026 Cho announced that Kang Young-hoon, former CEO of [The Sandbox](https://iq.wiki/wiki/the-sandbox) Korea, had joined 1Self.World to work on a [stablecoin](https://iq.wiki/wiki/stablecoin) service.[[1]](#cite-id-i3hecq518u) Reporting on the company additionally identified the recruitment of directors Park Tae-gyu and Kang Young-hoon, who previously led the [DeFi](https://iq.wiki/wiki/defi) platform KlaySwap (Ozis) and [The Sandbox](https://iq.wiki/wiki/the-sandbox) Korea respectively, and said the company intended to specify how W3ID would apply to the financial sector and to engage in discussions on wallet sovereignty and KYW, including through a private policy forum described as the \"On-chain Data Forum.\"[[4]](#cite-id-8lks05t6j7) Cho has also publicly commented on Korean [digital-asset](https://iq.wiki/wiki/digital-assets) regulation, stating that \"디지털자산기본법으로 새로운 생태계 열릴 것\" (\"a new ecosystem will open through the Basic Digital Asset Act\").[[1]](#cite-id-i3hecq518u)​","recentActivity":null,"operator":{"id":"0x1E23b34d3106F0C1c74D17f2Cd0F65cdb039b138"},"categories":[{"id":"people","title":"People in crypto"}],"tags":[{"id":"Founder"}],"images":[{"id":"QmV3Ga7iDr92Q45e7qBphGE9RCqchABm9TueZLJJ7YtA2F","type":"image/jpeg, image/png"}],"media":[{"name":"1573391672561.jpeg","id":"Qmcp7FrwNBKYzYLHPQb2sm3pAYS3hR5TBVk7rbPFr9vjmb","size":null,"type":null,"source":"IPFS_IMG"}],"linkedWikis":{"founders":[],"blockchains":[]},"events":[{"title":"Became Marketing Manager at Noon Entertainment Co., Ltd.","date":"2002-02-01","type":"DEFAULT","description":"Started role as Marketing Manager at Noon Entertainment in Seoul.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"9f31572a-baf4-48db-8b00-56228d77099a"},{"title":"Ended role as Marketing Manager at Noon Entertainment Co., Ltd.","date":"2004-05-01","type":"DEFAULT","description":"Ended tenure as Marketing Manager at Noon Entertainment.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"fa890a9f-43c1-4bf0-9af0-87c82b6e8f9a"},{"title":"Became Investment Manager at Withus Investment Co., Ltd.","date":"2004-05-01","type":"DEFAULT","description":"Started role as Investment Manager at Withus Investment Co., Ltd. in Seoul.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"b8f781e0-c8c9-48d6-8567-7300e4609a30"},{"title":"Ended role as Investment Manager at Withus Investment Co., Ltd.","date":"2006-05-01","type":"DEFAULT","description":"Ended tenure as Investment Manager at Withus Investment Co., Ltd.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"7a06122e-4e63-4c56-8711-ff05aa9ecbff"},{"title":"Became Associate Manager at Nemo Partners SCG","date":"2006-05-01","type":"DEFAULT","description":"Joined Nemo Partners SCG as an Associate Manager in Gangnam-gu, Seoul.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"3393d99e-baf0-4f9d-a01f-6955fd40cda5"},{"title":"Ended role as Associate Manager at Nemo Partners SCG","date":"2009-10-01","type":"DEFAULT","description":"Ended role as Associate Manager at Nemo Partners SCG.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"a234b988-7e79-489d-9ae8-6975782659f9"},{"id":"4cd73511-3a02-447d-b935-af63c561a871","type":"DEFAULT","date":"2009-11-01","multiDateStart":null,"multiDateEnd":null,"country":null,"continent":null,"title":"Became Partner at A.T. Kearney (Kearney)","description":"Became a partner at A.T. Kearney (now Kearney).","link":null},{"id":"fec7d7b8-9e04-4840-89a8-770eae6f242c","type":"DEFAULT","date":"2015-08-01","multiDateStart":null,"multiDateEnd":null,"country":null,"continent":null,"title":"Ended role at A.T. Kearney","description":"Ended role at A.T. Kearney.","link":null},{"title":"Became Board Member and CEO of Global & Innovative Group at FSN","date":"2015-09-01","type":"DEFAULT","description":"Became Board Member and CEO of the Global & Innovative Group at FSN.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"4aa5b3f9-a783-4bda-a113-f5eb06a0c483"},{"id":"71ce1232-e25d-4033-832e-dbdd1e866e2e","type":"DEFAULT","date":"2015-09-01","multiDateStart":null,"multiDateEnd":null,"country":null,"continent":null,"title":"Became CEO of FSN ASIA","description":"Assumed the role of CEO at FSN ASIA.","link":null},{"title":"Ended role as Board Member and CEO of Global & Innovative Group at FSN","date":"2022-11-01","type":"DEFAULT","description":"Ended role as Board Member and CEO of Global & Innovative Group at FSN.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"15ad9f59-d995-4e18-87e0-7a760e9dfdb1"},{"id":"7e6a6727-64b7-402c-8a5e-9aeb8dd3ecb3","type":"DEFAULT","date":"2022-12-01","multiDateStart":null,"multiDateEnd":null,"country":null,"continent":null,"title":"Left CEO role at FSN ASIA","description":"Ended tenure as CEO of FSN ASIA.","link":null},{"id":"1c6c654e-5bff-4e13-ab79-b4369766b441","type":"DEFAULT","date":"2023-05-01","multiDateStart":null,"multiDateEnd":null,"country":null,"continent":null,"title":"Became CEO of 1Self.World","description":"Assumed the role of CEO at 1Self.World.","link":null},{"title":"Pre-Series A funding of about USD 1.1 million from Crit Ventures","date":"2025-03-01","type":"DEFAULT","description":"1Self.World secures approximately USD 1.1 million (KRW 1.5 billion) from Crit Ventures in a Pre-Series A round.","link":"https://en.wowtale.net/2025/03/30/230711/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"2cced25e-db57-4075-933a-a0276db9ef5e"},{"title":"Second funding round from Crit Ventures","date":"2025-09-01","type":"DEFAULT","description":"Pre-Series A bridge round of about USD 1.5 million from Crit Ventures brings total external funding to around USD 2.4 million.","link":"https://en.wowtale.net/2025/09/02/232045/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"f8a6ea4b-9e6f-4941-8684-0641c3e2baaf"},{"title":"1Self.World joins XPLA mainnet as a node validator","date":"2025-09-01","type":"DEFAULT","description":"1Self.World joins the XPLA mainnet as a node validator.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"6d4b4ec6-0b4a-4eb9-8772-fdfe4dc73440"},{"title":"MyB reaches 1,000,000 wallets and 40 million SBTs","date":"2025-09-01","type":"DEFAULT","description":"Cho reports MyB has one million wallets and over 40 million SBTs issued.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"5677ac75-72ea-41fd-b1b5-9408cebc84ba"},{"title":"MOU with KSNet for KRW stablecoin payment pilot","date":"2025-12-01","type":"DEFAULT","description":"1Self.World signs MOU with KSNet for a KRW stablecoin-based payments and rewards pilot.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"6fce0566-50bd-4bcf-a6a8-090ca82bc06d"},{"title":"Kang Young-hoon joins 1Self.World","date":"2026-05-01","type":"DEFAULT","description":"Former The Sandbox Korea CEO Kang Young-hoon joins 1Self.World to lead development of a stablecoin service.","link":"https://www.linkedin.com/in/changhyun-cho/","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"18256955-a511-4d5f-babc-9f971e2e45c4"},{"title":"Average monthly sales exceed KRW 1 billion; 6M wallets and 77M SBTs","date":"2026-06-01","type":"DEFAULT","description":"Reporting notes average monthly sales exceeding KRW 1 billion with six million wallet users and 77 million SBTs.","link":"https://www.mk.co.kr/en/it/12116287","country":"South Korea","continent":"Asia","multiDateStart":null,"multiDateEnd":null,"id":"d34bd8d0-085e-4315-b21b-2249bbedb429"}],"founderWikis":[],"blockchainWikis":[],"metadata":[{"id":"linkedin_profile","value":"https://www.linkedin.com/in/changhyun-cho/"},{"id":"rootdata_profile","value":"https://www.rootdata.com/member/Changhyun%20Cho?k=MTkzMTI%3D"},{"id":"references","value":"[{\"id\":\"i3hecq518u\",\"url\":\"https://www.linkedin.com/in/changhyun-cho/\",\"description\":\"LinkedIn lists him as CEO of 1Self.World since May 2023\",\"timestamp\":1787919129882},{\"id\":\"peagwlkk5n\",\"url\":\"https://rocketreach.co/changhyun-cho-email_734884785\",\"description\":\"RocketReach lists him as CEO at 1Self.World\",\"timestamp\":1787919129882},{\"id\":\"wfxurxyv5m\",\"url\":\"https://theorg.com/org/1self-world?p=changhyun-cho\",\"description\":\"The Org lists Changhyun Cho as CEO of 1Self.World\",\"timestamp\":1787919129882},{\"id\":\"8lks05t6j7\",\"url\":\"https://www.mk.co.kr/en/it/12116287\",\"description\":\"W3ID combines wallet addresses and SBT data, with Korean and US patent status\",\"timestamp\":1787919129882},{\"id\":\"5lqzastai5\",\"url\":\"https://en.wowtale.net/2025/03/30/230711/\",\"description\":\"Pre-Series A of about USD 1.1 million from Crit Ventures\",\"timestamp\":1787919129882},{\"id\":\"f88j9lcae3\",\"url\":\"https://en.wowtale.net/2025/09/02/232045/\",\"description\":\"Cho's statement on funding and global expansion\",\"timestamp\":1787919129882}]"},{"id":"previous_cid","value":"QmVUWK5ytiWhfhk6fwzaayJmuSi4TAFSxQ6au1fJhc7yvT"},{"id":"commit-message","value":"Update Changhyun Cho wiki: expand summary, timeline, and tags"},{"id":"previous_cid","value":"QmVUWK5ytiWhfhk6fwzaayJmuSi4TAFSxQ6au1fJhc7yvT"}],"user":{"id":"0x8af7a19a26d8fbc48defb35aefb15ec8c407f889"},"author":{"id":"0x1E23b34d3106F0C1c74D17f2Cd0F65cdb039b138"},"views":14}