This article was first published on Deythere.
- Morgan Stanley’s Bitcoin Trust Reinforces the Same Dependency
- Why Coinbase Became the Default Custodian of Bitcoin ETFs
- An Industry Built on One Operating System
- Quantifying the Exposure: A $74 Billion Pressure Point
- Are Alternatives Being Developed or Overlooked?
- Conclusion
- Glossary
- Frequently Asked Questions About Bitcoin ETF Custody Risk
- What is Bitcoin ETF custody risk?
- Why exactly is Coinbase central to Bitcoin ETFs?
- How much Bitcoin ETF value is tied to Coinbase?
- Are alternatives to Coinbase custody available?
- References
The conversation about Bitcoin ETF custody risk is suddenly becoming pressing, after new data showed that over 80% in U.S. spot Bitcoin ETF assets are linked to a single custodian which is Coinbase.
With total assets under management in U.S. Bitcoin ETFs approaching $90 billion, estimates suggest that between $74 billion and $77 billion of that exposure is reliant on Coinbase’s custody infrastructure.
Morgan Stanley’s Bitcoin Trust Reinforces the Same Dependency
The launch of the Morgan Stanley Bitcoin Trust (MSBT) has injected a new force of concerns about custodial risk in a Bitcoin ETF.
It was announced on April 8, being the first U.S. bank-backed Bitcoin exchange-traded product providing investors direct exposure to Bitcoin in a regulated way.
The structure, however, is mostly a familiar one. Coinbase was selected as a primary custodian alongside traditional finance giant BNY Mellon.
Now, market watchers are saying that even as Wall Street moves deeper into crypto, it is still leaning on the same custody provider that makes up the ETF system.
Why Coinbase Became the Default Custodian of Bitcoin ETFs
To understand the Bitcoin ETF custody risk, there’s need to look more closely at how Coinbase reached this level of dominance.
Several structural factors can explain why so many issuers that have access to institutional-grade resources are increasingly converging on the same provider.
Coinbase is a regulated qualified custodian under New York trust laws, with a compliance profile that meets the standards of conservative institutional investors. This gave it one of the very few viable options when spot Bitcoin ETFs were approved in early 2024.
Timing was also important to the decision. Coinbase already had operational infrastructure when ETF issuers tried to launch products. That early advantage set a template for others to follow.
As more funds followed the same custody framework, network effects kicked in. Market makers and legal teams and institutional boards got comfortable with the Coinbase model, which in turn reduced the urge to bring alternative custodians into a new and highly monitored product class.
The result is a system in which familiarity with both the regulatory regime as well as technical systems that provide convenience have leaned toward concentration rather than diversification.
An Industry Built on One Operating System
On its surface, ETF structures are meant to protect investors. Assets are segregated, custody agreements create fiduciary duties, and insurance coverage helps cover losses.
However, this risk does not arise purely from ownership of Bitcoin ETF assets; it also comes from operational dependency.
If Coinbase were to go “down”, probably due to a technical outage, regulatory action or settlement failure; the effects would likely have a devastating effect across several ETFs at once.
Compared to traditional financial markets where custody is spread among a few large players, the Bitcoin ETF custody system looks to be extremely centralized. This results in a single point of operational sensitivity across a market worth tens of billions.
Such risk is even acknowledged by the ETF filings themselves, which frequently detail scenarios in which a custodian can no longer fulfill its role.
In these scenarios, the mechanism of creating and redeeming ETF shares may get disrupted and that can affect liquidity and price tracking. The risk is built into the structure.
Quantifying the Exposure: A $74 Billion Pressure Point
The risk of an Bitcoin ETF custodial chain can be better illustrated when looking at how the assets would be distributed across such funds.
| ETF / Issuer | Approx. AUM | Custody Structure |
| BlackRock IBIT | $55B+ | Primarily Coinbase |
| Grayscale ETFs | $14B+ | Coinbase-linked |
| Bitwise BITB | $2.6B | Coinbase |
| ARK 21Shares ARKB | $2.5B | Multi-custodian (Coinbase included) |
| Others (BRRR, EZBC, BTCW, etc.) | Billions combined | Coinbase dominant |
Combined, these figures push the amount of Coinbase-linked exposure above $74 billion even on a conservative basis.
This concentration means that any disruption involving Coinbase would not just affect one fund, it would cut through almost the entire ETF market.
Are Alternatives Being Developed or Overlooked?
There are alternatives, even if Coinbase is dominant. Fidelity is self-custodying Bitcoin with its digital asset unit.
VanEck uses custody from Gemini, and a handful of issuers have developed multi-custodian models with companies like Anchorage Digital. But those Bitcoin ETF custody options make up only a small portion of total ETF assets.
The persistence of Coinbase’s Bitcoin ETF custody supremacy raises an awkward question: is this concentration the result of deliberate choice, or simply a lack of viable, scalable alternatives at the time ETFs launched? So far, the industry has offered no definitive response.
Conclusion
With their advantages and innovations, Bitcoin ETFs have quickly transformed the way institutional investors access crypto while bringing legitimacy and scale to the market. Yet, beneath success lies an imbalance.
With more than $74 billion tied to a single custodian, Bitcoin ETF custody risk is now one of the defining characteristics of today’s market.
It is not known if the industry would respond to this concentration by either taking action or waiting for a disruption that forces change. For now, the system works. But its resilience remains untested.
Glossary
Custodian: An entity that professionally holds onto assets for the benefit of an investor.
Spot Bitcoin ETF: A fund that directly buys and holds Bitcoin instead of derivatives.
AUM (Assets Under Management): The total market value of a fund’s assets.
Cold Storage: An offline way to keep the cryptocurrencies secure.
ETF Creation/Redemption: the process where ETF shares are added or subtracted to keep a close price alignment.
Frequently Asked Questions About Bitcoin ETF Custody Risk
What is Bitcoin ETF custody risk?
Bitcoin ETF custody risk is the risk posed by relying on a single custodian or small number of custodians to hold Bitcoin ETF assets .
Why exactly is Coinbase central to Bitcoin ETFs?
The reason behind this is Coinbase’s regulatory compliance, prior infrastructure setup, and therefore became the default choice during ETF launch.
How much Bitcoin ETF value is tied to Coinbase?
Some estimates pull between $74 billion and $77 billion, over 80% of the U.S. market, as having some connection to Coinbase custody.
Are alternatives to Coinbase custody available?
Yes, such as Fidelity’s self-custody model and firms like Gemini and Anchorage, but their market share is still small.
References
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