Crypto Custody Explained: Who Holds Your Assets?
A clear guide to crypto custody — what it means, who controls your assets, the custodial and non-custodial models, the risks, and where Swiss regulation fits.
“Custody” is one of those crypto words that sounds technical but describes something simple and important: who actually controls your assets. In traditional finance, a custodian is an institution that safeguards your money or securities. In crypto, custody is about who holds the keys that control your coins, and that turns out to be one of the most consequential questions you can ask about any platform.
This guide explains what crypto custody means, the two main models, the risks involved, and how Swiss regulation is increasingly focused on it.
Custody is really about keys
To understand custody, start with what a wallet actually does. As we explain in what a crypto wallet is, your coins live on the blockchain, what’s actually held are the private keys that control them. So “custody” really means: who holds the private keys?
That’s the whole concept in one line. Whoever controls the keys controls the assets. Everything else about custody, the models, the risks, the regulation, is a consequence of that single fact.
The two custody models
There are two broad answers to “who holds the keys,” and they define the two custody models. We cover the practical trade-offs in detail in custodial vs non-custodial wallets, but in custody terms the distinction is this.
In custodial crypto, a third party, usually a platform, holds the keys on your behalf. You have an account, and the provider safeguards the assets, much like a bank. In non-custodial crypto, you hold the keys yourself, so no provider can move your funds without you. The first prioritises convenience and relies on the provider; the second prioritises control and relies on you. Which model a platform uses tells you, immediately, who is responsible for safekeeping.
Custody risks to understand
Each model concentrates risk in a different place, and understanding where is the point of learning about custody. With custodial arrangements, the central risks are the provider’s security, its solvency, and how it segregates and protects client assets, if a custodian is hacked, fails, or mismanages funds, customers can be exposed. This is why a custodian’s strength and transparency matter so much.
With non-custodial arrangements, the risk shifts to the individual: losing keys or a recovery phrase, or being tricked into handing them over. Because self-custody puts everything on the user, it’s a heavy target for social engineering, so knowing how to spot a crypto scam is part of custody safety. In both models, the rule is constant: never share your private keys or recovery phrase with anyone.
Custody and Swiss regulation
Custody has become one of the central concerns of crypto regulation, and Switzerland is a clear example. As our guide to Swiss crypto regulation in 2026 explains, FINMA’s guidance on the custody of crypto-based assets sets out expectations around the safekeeping of client assets, the technical competence required, and how responsibility is allocated, including where insolvency or third parties are involved.
For users, the practical implication is that the custody model decides who is responsible for safekeeping. A platform operating under Swiss anti-money-laundering supervision, for example as a VQF SRO member, is supervised for its anti-money-laundering obligations. That supervision is not a guarantee of safekeeping, so the custody model still matters.
Why “non-custodial” can be the stronger position
There’s a common assumption that the safest option is to hand your crypto to a big custodian. But custody concentrates risk: if a custodian fails, everything it holds is exposed at once. A non-custodial model removes that single point of failure by leaving control of the keys with the user.
The strongest position combines the two strengths most platforms force you to choose between: the oversight of a regulated, supervised provider, and the control of non-custodial key ownership. That’s the approach Eti-Tech takes: a VQF SRO member, supervised as a Virtual Asset Service Provider through its VQF membership, with a self-custodial wallet. Its private key is split into encrypted shares that Eti-Tech never holds, and you can export it at any time.
What to remember
Crypto custody comes down to one question: who holds the keys. Custodial means a third party does, concentrating both convenience and risk with the provider. Non-custodial means you do, giving you control along with the responsibility that comes with it. Swiss regulation increasingly treats custody as a serious, supervised matter rather than a technical detail.
Knowing which model a platform uses, and being comfortable with it, is one of the most important checks you can make. You can see how Eti-Tech is set up and supervised, while remaining non-custodial, on our Registration page.
FAQ
- What is crypto custody?
- Crypto custody refers to who holds and controls the private keys that control your crypto-assets. Whoever holds the keys controls the assets, so custody is really about key control.
- What is the difference between custodial and non-custodial custody?
- In custodial crypto, a third party such as a platform holds your keys for you. In non-custodial crypto, you hold your own keys, so no provider can move your funds without you. Anyone who gets hold of your keys or your account access can, though, so protecting them is your job.
- Is custodial or non-custodial safer?
- Neither is automatically safer, the risk simply moves. Custodial concentrates risk with the provider; non-custodial places it on you to safeguard your keys. A regulated, non-custodial platform aims to combine oversight with user control.
- How does Swiss regulation treat crypto custody?
- Swiss regulation, including FINMA guidance on the custody of crypto-based assets, sets expectations around safekeeping, technical competence, and responsibility for client assets, especially where third parties or insolvency are involved.
- Is Eti-Tech custodial?
- No. Eti-Tech’s wallet is self-custodial: Eti-Tech holds no key share or signing permission, and you can export your private key at any time. Eti-Tech AG is a VQF SRO member, supervised as a Virtual Asset Service Provider through its VQF membership.
Related reading
Crypto-assets involve significant risk. Their value can rise or fall, and you may lose part or all of your investment. Custody risk, loss-of-access risk, counterparty risk, and irreversible transactions may apply. This article is for informational purposes only and does not constitute investment advice, legal advice, an offer, or a solicitation. Eti-Tech AG is a VQF SRO member and a Swiss VASP.
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