How to Store Bitcoin Safely: Security and Custody Explained
Bitcoin security starts with how you store it. Even though the blockchain itself is unbreakable, your coins are only as safe as your storage method. In this guide, we’ll break down how to store bitcoin safely – comparing custodial vs non-custodial wallets, hardware devices, mobile apps, and other options. You’ll learn how to choose the right setup for your goals, risk tolerance, and level of control.
We produced this guide in partnership with Xapo Bank*.
Bitcoin Security: how bitcoin keeps itself secure
Before we compare the different bitcoin storage methods, it’s worth understanding what makes bitcoin itself secure. Bitcoin doesn’t rely on banks and regulations to secure money. Instead, miners and cryptography secure the blockchain.
When you send bitcoin, the network bundles your transaction into a block with thousands of others. That block is then locked with SHA-256 – a cryptographic algorithm so strong, even the world’s most powerful supercomputer couldn’t crack it in millions of years.
To “unlock” the block, miners race to find a matching hash – a one-in-trillions digital fingerprint. That’s no solo effort. Miners around the world pool their computing power, running trillions of guesses per second. Eventually, one machine finds the hash. The winning miner broadcasts the result, the network verifies it, and the block goes on the blockchain.
This process is called proof-of-work – and it’s what keeps bitcoin secure.
Each block that follows makes the previous one harder to reverse, like a fly getting stuck deeper in amber (Nick Szabo’s analogy). After six blocks (about an hour), a transaction becomes virtually impossible to change. Even after one block, reversing it would require more than half the computer power of the entire bitcoin mining network. Not only would that be practically impossible, but it would also be extremely expensive.
The image below shows how bitcoin transactions become exponentially more secure with each successive 10-minute block.
So yes, bitcoin is secure. And the blockchain itself has never been hacked or compromised. But that doesn’t mean your coins are always safe. The blockchain can’t protect you if you lose your keys, expose them, or someone hacks them.
Protecting your stack is your job – and it starts with choosing the right way to store your bitcoin. This will depend on the kind of bitcoin wallet you use.
What is a bitcoin wallet?
A wallet doesn’t hold bitcoin the way a physical wallet holds cash. Instead, it stores the keys that control your bitcoin. There are two keys:
- Public key: acts like your account number and lets people send you BTC.
- Private key: your password – it proves you own your bitcoin and lets you spend it.
Anyone with access to your private key can take your funds, so protecting that key is everything. A bitcoin wallet simply gives you a way to view balances, send and receive funds, and safeguard your private key.
Custodial vs non-custodial bitcoin wallets
Every bitcoin wallet falls into one of two categories: custodial or non-custodial.
A custodial wallet means a third party controls your private keys. You can log in, check your balance, and send or receive bitcoin. But you’re trusting someone else – typically a custodian, exchange, or wallet provider – to store and protect your funds. In this setup, you don’t directly own the keys; you just have access to the account. If the provider suffers a hack or goes offline, your bitcoin could be at risk.
A non-custodial wallet, on the other hand, gives you full control. You generate and store your own private keys – often protected by a 12- or 24-word seed phrase. This seed is a human-readable backup of your key. If you lose or damage your wallet, you can usually restore access with this phrase – as long as you’ve kept it safe. No third party has access, which means no one can block, freeze, or confiscate your bitcoin. But it also means there’s no “forgot password” option.
| Wallet type | Who controls the private keys? | Examples |
|---|---|---|
| Custodial | A third party (not you) | Xapo Bank*, Coinbase, Binance, Bitcoin ETF (e.g. BlackRock IBIT) |
| Non-custodial | You | Ledger, Trezor, Sparrow, BlueWallet |
Note: Some non-custodial wallets also support encrypted cloud backups or shared recovery, reducing the risk of total loss.
How to store bitcoin: six methods compared
There are many ways to store bitcoin. Each method has trade-offs in terms of control, convenience, and security. Here’s a quick overview of six options:
1. Crypto exchange: The easiest way to get started. Technically custodial – the exchange holds your keys. They offer convenience, but pose a higher risk if hacked or poorly managed.
2. Licensed custodian (e.g. Xapo Bank*): A trusted third party with institutional-grade security, often regulated. Great for larger holdings or earning yield, but it requires trust.
3. Hardware wallet (e.g. Ledger, Trezor): A physical device that stores your private keys offline. Offers an excellent balance of security and control for long-term holders.
4. Mobile wallet (e.g. BlueWallet, Muun): A non-custodial and user-friendly option. Works well for everyday use, but offers less security than hardware wallets if someone steals or compromises your phone.
5. Multisig wallet: A wallet that requires multiple keys to access funds. Ideal for high-value storage or shared control. Very secure, but setup and recovery are more complex.
6. Paper wallet / air-gapped device: Fully offline storage options. Maximum security when done right – but easy to mess up. Not recommended for beginners.
The table below compares each of these methods based on their ease of use, security level, and who they might suit.
| Storage method | Custody type | Ease of use | Security level | Best for |
|---|---|---|---|---|
| Crypto exchange | Custodial | Very easy | Medium to high (depends on exchange) | Beginners, traders |
| Licensed custodian | Custodial | Easy | Very high (depends on the custodian) | Large holders, yield seekers |
| Hardware wallet | Non-custodial | Moderate | High | Long-term holders |
| Mobile wallet | Non-custodial | Easy | Medium to high (depends on wallet) | Everyday spending |
| Multisig wallet | Non-custodial | Complex | Very high (if done right) | Advanced, tech-savvy holders |
| Paper wallet / air-gapped | Non-custodial | Complex | Very high (if done right) | Ultra-secure cold storage with no digital footprint |
Which is a safer way to store bitcoin: custodial or non-custodial wallets?
There’s no clear-cut answer here – it depends on the provider, the user, and the setup.
A well-managed custodial service can offer institutional-grade security, regulated protection, and multi-layered cold storage. For users with large holdings or limited technical expertise, these can be a safer option than managing private keys alone.
But custodial storage still requires trust. If the custodian suffers a hack, acts dishonestly, or freezes your assets, you won’t have much recourse. You’re giving up control in exchange for convenience and support.
Non-custodial wallets, on the other hand, give you full control – but also full responsibility. If done right, self-custody can be extremely secure. A properly set up hardware wallet stored offline, with backups in separate locations, is hard to beat. But mistakes can be unforgiving. Lost seed phrases, phishing attacks, or faulty devices have locked many people out of their own bitcoin forever.
For example, in 2013 a Welshman named James Howells threw his computer hard drive in the bin. The IT programmer had been mining bitcoin since 2009. And he forgot he stored the private keys for 7,500 coins on that hard drive. He asked his local council in Newport, Wales, for permission to search the landfill where the hard drive ended up. But so far, he hasn’t had much luck.
So to sum up:
- A secure custodian may be safer than poor self-custody.
- But excellent self-custody is safer than trusting the wrong third party.
We produced this guide in partnership with Xapo Bank
The Xapo Bank app provides fully licensed banking and bitcoin custody services*. It offers secure storage, daily interest on bitcoin and USD balances (paid in BTC), and a global debit card with up to 1% cashback in bitcoin. Eligible members can also access instant bitcoin-backed loans of up to $1 million without selling their BTC. With a focus on long-term security and simple user experience, the Xapo Bank app is designed for bitcoin holders who want institutional-grade custody.
Check out Xapo Bank to see how it works.
Key takeaways
- Storing bitcoin safely means choosing between custodial and non-custodial wallets – or a mix of both.
- Self-custody gives users full control of their bitcoin. But it usually requires planning, backups, and technical confidence.
- Custodial storage simplifies access and adds potential features like yield, loans, and inheritance tools – but requires trust.
- The best setup depends on how much bitcoin you own and how often you use it. It also depends on how tech-savvy you are, and how much responsibility you’re willing to take to protect your stack.
*Crypto asset services are provided by Xapo Vasp Limited, a company regulated by the Gibraltar Financial Services Commission as a ‘Distributed Ledger Technology Provider’ under Permission No. 26061 and not by Xapo Bank Limited. Xapo Bank Limited provides services exclusively in respect of fiat balances. Crypto asset deposits are not covered by the Gibraltar Deposit Guarantee Scheme.
As usual, none of this is investment advice. If you liked this analysis, check out our free newsletter for how-to guides and investment insights across crypto, stocks, metals, and more.
