How Safe Is Your Bitcoin? Seven Questions to Ask Yourself 

In the wake of recent Bitcoin software hacks, you might be wondering how to best keep your bitcoin safe.

It’s important to figure out what kind of bitcoin custody works for you, and to make sure you’re comfortable with the ins and outs of your storage setup.

If you are second guessing your security set up, you might consider using a Fedimint Federation, which helps you to distribute your risk.

However, with all setups, there are trade-offs: A certain setup might protect you well against one risk while leaving you exposed to another. For example, self-custody removes your dependence on a custodian but puts more responsibility on you.

Here are seven questions to ask yourself about how you’re currently safeguarding your bitcoin: 

1. Who controls the keys to your bitcoin?

Who holds the private keys to bitcoin determines who has the authority to spend it. Seeing a bitcoin balance on your exchange account is different from holding your bitcoin private keys in self-custody.

With a self-custody wallet, you control the private keys. On an exchange, the company controls them on your behalf. 

Other arrangements distribute control. A multisignature wallet, for example, requires a specified number of keys to authorise a transaction, rather than relying on just one. 

This distinction matters because it determines who can move your bitcoin and whose cooperation you need to access it. 

In choosing a custody method, decide whether you control the keys yourself, share control with others, or rely entirely on a third party. 

2. What happens if you lose your device?

You should understand how to recover your private keys before an emergency happens. If the device you use to store your bitcoin disappeared today, would you know how to regain access to your bitcoin?

Losing a device shouldn't automatically mean losing your bitcoin, as long as your custody setup includes an appropriate recovery mechanism. Asking yourself what happens if you lose your device will help you determine how safe your bitcoin is.

Many self-custody wallets use a recovery seed phrase to restore access on another device. If you lose the device but still have your seed phrase, you can restore your wallet. 

Custodial services typically offer account recovery through identity verification or other security procedures. This removes the need to manage a seed phrase, though recovery still depends on the provider’s policies.

Other systems take a different approach, including recovery mechanisms that rely on trusted people or members of your community.

3. Is your backup creating another security risk?

A recovery backup protects you from losing access to your bitcoin, but poor storage practices can introduce new vulnerabilities.

Consider someone who keeps their hardware wallet and recovery seed phrase in the same location. A fire or theft might destroy or expose both, defeating the purpose of having a backup. 

Saving a seed phrase in an email account or unencrypted cloud document introduces a different risk. Anyone who compromises the account could access the information and, in turn, steal your bitcoin. 

For people managing their own keys, backup security requires balancing two competing needs: keeping recovery information accessible when needed and preventing unauthorised access to said information. 

That means thinking about more than where a backup is stored. You also need to consider who has access to it, what happens if you can no longer access the location where the backup is stored, and whether or not a single incident might compromise access to your bitcoin. 

4. What happens if you make a mistake?

Bitcoin security discussions often focus on external threats, such as hackers and malicious software, but human error poses its own risks. 

Complex custody arrangements introduce challenges. A system might offer strong technical protections while requiring users to manage multiple devices, backups, or recovery procedures. 

Those additional responsibilities are worth considering, especially if you are unfamiliar with the technology. 

A useful test is whether you understand your custody arrangement well enough to operate it correctly under pressure. If you struggle to explain how to recover your bitcoin, it may be worth reviewing the setup and changing it if needed. 

5. What happens if a custodian fails?

Your bitcoin might be secure against your own mistakes but remain vulnerable to someone else's actions or failure. 

For example, keeping bitcoin on an exchange means depending on the company to safeguard funds and process withdrawals. If it becomes insolvent, suffers a security breach, or suspends withdrawals, you might lose access to your bitcoin. 

Collaborative custody arrangements introduce different dependencies. 

Consider a multisignature wallet that requires two of three keys to authorise transactions. If one keyholder becomes unavailable, the remaining two might still access the funds. But if two keyholders become unavailable, and no alternative recovery arrangement exists, the bitcoin might become inaccessible. 

The important distinction is between trusting a third party for some help and depending entirely on them.

A custody arrangement designed to tolerate an individual participant's failure has a different risk profile than one where a single person or company has complete control. 

6. How many things have to go wrong before your bitcoin is at risk?

This question gets to the heart of how custody systems handle failure. 

In a wallet controlled by one private key, compromising that key might be enough for an attacker to steal the funds. 

Multisignature vaults reduce this risk by requiring multiple keys. In a two-of-three setup, an attacker who compromises one key still needs another to authorise a transaction. 

Fedimint, an open-source bitcoin custody protocol, applies the related principle through a model known as community custody. 

Instead of relying on one custodian, a Federation distributes control among several trusted participants called Guardians. A defined threshold of Guardians must cooperate to authorise movements of the Federation’s bitcoin. 

No individual Guardian has sufficient authority to move the funds alone. 

The approach is designed around fault tolerance, which means allowing a system to continue operating despite certain failures. It does not eliminate risk. 

A sufficient number of Guardians acting maliciously together, or a software vulnerability, might still compromise funds or access. 

To the point about the software vulnerability, the question changes. It becomes less about whether one person or device might fail and more about how many independent failures the system/code is designed to withstand.

Fedi CEO Obi Nwosu recently put out a call to action for Fedimint developers to create multiple implementations of the protocol to mitigate against bugs that could be fatal if Fedimint users just use one implementation of the protocol, and the community responded.

7. Who are you comfortable trusting?

Every custody arrangement involves trade-offs, including how much responsibility you want to manage yourself and how much you are willing to place with others. 

Self-custody gives you direct control of your bitcoin, but also makes you responsible for protecting your keys and maintaining seed backups.

Custodial services take on much of that responsibility, although you must depend on the provider’s security practices, financial stability, and willingness to honour withdrawals. 

Collaborative custody distributes control across multiple keys or parties. Community custody extends this approach by allowing a group of Guardians to collectively manage bitcoin on behalf of a community. 

The right choice depends on your priorities, technical knowledge, and risk tolerance. 

Someone comfortable managing private keys might prefer self-custody. Someone who values convenience might choose a custodial service. Others might prefer a system that shares responsibility across several trusted participants.

Rather than asking whether a custody arrangement requires trust, consider who you are trusting, what authority they have, and what happens if they fail. 

Which option is right for you?

For someone who wants exclusive control over their private keys, self-custody remains the more appropriate choice. For those who prefer shared responsibility, community custody offers another option. 

Ultimately, the safest custody arrangement isn't necessarily the one with the most sophisticated technology. It's the one whose risks, responsibilities, and recovery procedures you understand and can manage.