Centralized Exchange (CEX)
A crypto trading platform run by a single company, holding user funds and matching orders internally.
A centralized exchange (CEX) is a company that operates as a custodian, order book, and matching engine for cryptocurrency trades. Coinbase, Binance, Kraken, Cash App, and a long tail of others. You deposit BTC; they hold it; you trade on their internal ledger; you withdraw if and when they let you.
What CEXs are good at:
- Liquidity. Major CEXs match hundreds of millions to billions of dollars of daily volume, so you can buy or sell large amounts without moving the price significantly.
- Fiat on-ramps. Bank transfers, debit cards, and other off-ramp infrastructure that decentralized alternatives can't match.
- User experience. Polished apps, customer support, and integration with other financial services.
- Trading features. Limit orders, futures, options, margin - the full traditional-finance toolkit.
What CEXs are not:
- Where you should keep Bitcoin you actually want to own. A CEX balance is a claim on Bitcoin, not Bitcoin itself. The exchange's solvency, custody practices, and regulatory good standing are all between you and your money.
The historical record on CEXs failing is long and continuing: Mt. Gox (2014), QuadrigaCX (2019), Celsius, Voyager, BlockFi and FTX (2022), Genesis (froze in 2022, filed in 2023). The 2022 contagion alone locked up billions of dollars of customer balances for years. Celsius halted withdrawals with $4.7 billion of customer assets on its platform, and FTX turned out to have a hole of about $8 billion where customer money should have been. See Counterparty Risk for the broader framing and for what customers eventually got back.
The pragmatic approach: CEXs are useful on-ramps. Use one to convert fiat to BTC. Withdraw to a self-custody wallet (ideally a hardware wallet) for any meaningful amount. Don't treat the exchange balance as savings.
See Decentralized Exchange (DEX) for the non-custodial alternative.
Key takeaways
- Easier user experience but custodial by nature
- Subject to hacks or withdrawal restrictions
- High liquidity and broad coin offerings
Related chapters
Corrected
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Was: The entry said the 2022 contagion alone destroyed tens of billions in customer balances, and grouped Genesis with the 2022 failures without noting that it did not file for bankruptcy until 2023.
Now: The 2022 contagion locked up billions of dollars of customer balances for years rather than destroying tens of billions: Celsius halted withdrawals with $4.7 billion of customer assets on its platform, and FTX had a shortfall of about $8 billion. Much of that money was later paid back in dollars through the bankruptcies, which the Counterparty Risk entry now covers. Genesis froze its lending business in November 2022 and filed for bankruptcy in January 2023. Details
Sources (8)
- NPR - Mt. Gox files for bankruptcy, nearly $500M of bitcoins lost (February 28, 2014): Mt. Gox, once the world's largest bitcoin exchange, filed for bankruptcy protection in Japan
- Ontario Securities Commission - QuadrigaCX: A Review by Staff of the Ontario Securities Commission (2020): on January 14, 2019 Quadriga announced that its CEO, Gerald Cotten, had died; over 76,000 clients were owed $215 million and lost at least $169 million, most of it to Cotten's fraud
- US DOJ, SDNY - founder of Celsius sentenced to 12 years (May 8, 2025): Celsius halted customer withdrawals on June 12, 2022, when hundreds of thousands of customers had $4.7 billion in inaccessible assets on the platform; it filed for bankruptcy on July 13, 2022
- Voyager Digital - first-day declaration of Stephen Ehrlich, In re Voyager Digital Holdings (Bankr. S.D.N.Y. 22-10943), Doc 15 (July 6, 2022): on July 1, 2022 the company froze all withdrawals and trading on its platform; the petition date was July 5, 2022
- CNBC - BlockFi files for bankruptcy as FTX fallout spreads (November 28, 2022): BlockFi filed for Chapter 11 in the District of New Jersey after the implosion of FTX, listing more than 100,000 creditors
- Kroll, FTX case information: FTX Trading Ltd. and its affiliated debtors filed for Chapter 11 on November 11 and 14, 2022; the plan became effective on January 3, 2025
- Genesis Global Holdco - first-day declaration of A. Derar Islim, In re Genesis (Bankr. S.D.N.Y. 23-10063), Doc 17 (January 20, 2023): Genesis paused all lending and borrowing on November 16, 2022 and filed for Chapter 11 on January 19, 2023
- SEC v. Bankman-Fried (S.D.N.Y. 22-cv-10501), complaint (December 13, 2022): FTX customers withdrew about $5 billion in a day; Bankman-Fried sought emergency funding to cover a shortfall at FTX of approximately $8 billion
Related terms (6)
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