The Hidden Risk of Keeping Stablecoins on Exchanges

A stablecoin sitting in an exchange account looks safe. It’s designed to always equal one dollar. It sits on a platform you’ve chosen to trust. But that balance depends on three separate things, all working at once. The exchange has to remain solvent. The company that issues the stablecoin has to actually hold the reserves it claims to hold. And the banks where that issuer keeps those reserves have to stay solvent too. In March 2023, the second-largest stablecoin in the world briefly failed the third test. It wasn’t a crypto problem at all. It was an ordinary regional bank collapse in California.

Most coverage of stablecoin risk stops at “is it backed 1:1.” That’s only one of three points where the chain of trust can break. Holding a stablecoin on an exchange adds a layer most people don’t even realize is there.

Key Facts

TL;DR

• A stablecoin held on an exchange depends on three separate layers of solvency: the exchange, the stablecoin issuer, and the banks holding the issuer’s reserves.
• USDC’s March 2023 depeg came from a regional bank failure. It had nothing to do with crypto. Even a stablecoin widely seen as well-managed can wobble from a source most holders never think about.
• Tether, the largest stablecoin by market capitalization, has a documented history of misrepresenting its reserves. It settled with New York’s Attorney General in 2021. It still does not publish a full audit, only periodic attestations.
• Holding a stablecoin on an exchange means trusting the exchange’s own solvency on top of all of this. The balance shown in your account is the exchange’s record of what it owes you. It is not necessarily a specific token held in your name.
• “Stable” describes the intended price behavior of the token. It says nothing about the custody risk of the platform holding it for you.

The Three-Layer Risk Stack Nobody Explains Clearly

Most explanations of stablecoin risk focus entirely on the issuer. Is the stablecoin actually backed by real dollars? Can you trust the company’s claims about its reserves? That’s an important question. But it’s only the middle layer of a three-part chain. That chain determines whether your stablecoin balance is actually worth a dollar when you need it to be.

The first layer is the exchange itself. When you hold USDC or USDT in an exchange account, you usually don’t hold a specific token in a wallet you control. You hold a balance. The exchange’s internal ledger says it owes you that balance. It’s backed by the exchange’s own solvency and its own custody practices. That’s the same custody risk that applies to any other asset held on that platform.

The second layer is the stablecoin issuer. This is the company responsible for actually holding reserves equal to the tokens in circulation, and for honoring redemptions.

The third layer is the one almost no consumer coverage addresses: the traditional banking system the issuer relies on to hold those reserves. Stablecoins are, structurally, a promise backed by conventional bank deposits and short-term securities. That means stablecoin holders are exposed to traditional banking risk. Nothing about using a stablecoin feels like traditional banking, but the underlying exposure is there anyway.

When the Third Layer Broke: USDC and Silicon Valley Bank

On March 10, 2023, California regulators closed Silicon Valley Bank after a rapid deposit run. Late that evening, Circle confirmed the bad news. $3.3 billion of USDC’s cash reserves, about 8% of the total backing the token, remained on deposit at SVB. It was not immediately accessible.

The market reaction was immediate. Investors began redeeming USDC and selling it on exchanges faster than Circle could process. USDC’s price fell to roughly $0.87 in early trading hours on March 11. That was a meaningful break from its intended $1.00 value. The depeg didn’t stop with USDC, either. Other stablecoins, including MakerDAO’s DAI, held part of their own backing in USDC. They briefly lost their peg too. It showed how quickly a problem at one bank can ripple across a whole chain of dependent products.

USDC recovered its peg within days. Federal regulators announced that all SVB depositors would be made whole, not just those under the standard $250,000 insurance limit. That decision, not any action by Circle itself, is what actually resolved the crisis. Had regulators made a different choice that weekend, USDC holders would have faced a very different outcome. And it would have happened entirely because of exposure at a bank most crypto users had never heard of before that Friday.

The Second Layer: What the Tether Settlement Actually Revealed

Tether is the largest stablecoin by market capitalization. It has faced a different kind of scrutiny: whether its reserve claims were accurate at all. In February 2021, Tether and its affiliated exchange Bitfinex settled with the New York Attorney General’s office. They agreed to pay $18.5 million. The allegations included misrepresenting how much of Tether was backed by real dollars, and concealing an $850 million loss of commingled customer and corporate funds. The investigation found something striking: for several months in 2017, Bitfinex and Tether had no banking relationship anywhere in the world. During that period, New York officials concluded, the companies could not have held the reserves needed to fully back the Tethers already in circulation.

As part of the settlement, Tether agreed to publish quarterly reports on its reserve composition. It was also barred from further business with New York residents. It’s worth being precise about what that settlement did and didn’t establish. Tether and Bitfinex admitted no wrongdoing. The case centered on a specific historical period, not Tether’s current reserve status. But the underlying pattern is exactly the second-layer risk this article is describing: a stablecoin issuer whose reserve claims outran what regulators could verify. That pattern is a matter of public legal record, not speculation.

Comparison: What Each Layer Is Actually Responsible For

What Users Actually Lose, and Who Benefits From the Confusion

Exchanges and issuers both benefit from one common perception: that stablecoins are functionally equivalent to cash. That perception drives enormous trading volume. It makes stablecoins the default parking spot for crypto users moving between positions. Neither party has a strong incentive to emphasize how many separate points of failure sit underneath that perception. When any one of the three layers breaks, the risk lands on the individual holder. That holder typically has no visibility into an exchange’s solvency, an issuer’s actual reserve composition, or which specific banks are holding that issuer’s cash on any given day.

Practical Guidance

• Don’t treat a stablecoin balance on an exchange as equivalent to cash in a bank account. It carries exchange custody risk on top of the stablecoin’s own backing risk.
• Check whether a stablecoin issuer publishes regular, detailed reserve reports. Understand the difference between an “attestation,” a limited-scope review, and a full independent audit.
• Diversify stablecoin holdings across issuers if you hold significant balances. A single-issuer or single-bank failure, as with USDC and SVB, can affect an entire token’s peg at once.
• Consider moving significant stablecoin holdings to self-custody if you’re mainly worried about exchange solvency risk. This won’t remove issuer or banking-layer risk underneath the token itself, though.
• Watch for concentration risk disclosures. Circle now publishes more granular detail about its banking partners since 2023. Comparing issuers on this kind of transparency is a reasonable way to judge relative risk.

What Happens Next

Expect continued regulatory attention to stablecoin reserve quality. Both the SVB episode and years of scrutiny over Tether’s disclosures have kept this issue in focus. Federal stablecoin legislation enacted in 2025 introduced reserve and disclosure requirements for payment stablecoin issuers going forward, a direct response to episodes like these. That legislation addresses the second layer of the risk stack described here. It does not change exchange-level custody risk. That risk remains governed by the same bankruptcy and contract-law questions that apply to any other asset held on a platform.

FAQs

Is a stablecoin held on an exchange the same as holding real dollars? No. It depends on the exchange’s solvency, the issuer’s actual reserve backing, and the banks holding those reserves, all functioning correctly at the same time.

Why did USDC lose its dollar peg in March 2023? Circle, the company behind USDC, held $3.3 billion of USDC’s reserves at Silicon Valley Bank, which was shut down by regulators. Fears about accessing those funds triggered rapid redemptions and a temporary price drop to about $0.87.

Did Tether ever admit to misrepresenting its reserves? Tether and Bitfinex settled with the New York Attorney General in 2021 for $18.5 million without admitting or denying wrongdoing. But the investigation’s findings, including a period when the companies had no banking relationship at all, are part of the public settlement record.

Does holding a stablecoin protect you from exchange failure? No. A stablecoin balance on an exchange is still subject to that exchange’s own custody and solvency risk, separate from whether the stablecoin itself is properly backed.

Sources

• Circle, “$3.3 Billion of USDC Reserve Risk Removed, Dollar De-Peg Closes”
• Chainalysis, “Crypto Market Reaction to Silicon Valley Bank and USDC Depeg”
• Decrypt, “USDC Stablecoin Falls to 87 Cents After Circle Discloses Exposure to Silicon Valley Bank”
• CNBC, “Cryptocurrency firms Tether and Bitfinex agree to pay $18.5 million fine to end New York probe”
• Banking Dive, “Tether, crypto exchange Bitfinex to pay $18.5M to settle NY probe”

This article is for educational purposes and does not constitute financial or legal advice. Stablecoins are not guaranteed to maintain their peg and are not protected by federal deposit insurance when held on an exchange. If you are making decisions about where to hold significant savings, consider consulting a licensed financial advisor.