To store Bitcoin securely, protect the private keys that authorize spending, keep only the amount you need for routine transactions in an internet-connected wallet, and make a private, usable backup that you know how to restore. A wallet does not hold bitcoin as a file: it manages keys used to control bitcoin recorded on the blockchain. With self-custody, you control those keys—and are responsible for keeping them safe and recoverable.
What is self-custody?
Self-custody means you, rather than an exchange or other service, control the private keys used to authorize Bitcoin transactions. That control also means there is no central help desk that can reset your wallet in the way a bank might reset an account. If you lose access credentials and cannot use a valid backup, the funds may be permanently inaccessible. Bitcoin.org states: “No one—not developers, miners, wallet providers, or exchanges—can recover funds that you permanently lose from a self-custodied wallet.” Bitcoin.org’s guidance on what users need to know also explains that Bitcoin transactions are irreversible unless the recipient voluntarily returns the funds.
What is the difference between a hot wallet and a cold wallet?
A hot wallet keeps its keys on a device connected to the internet, such as a phone or computer. It is convenient for frequent transactions, but the connected device creates more exposure to cyberthreats. A cold wallet keeps keys offline, reducing online attack exposure, but it is less convenient and can be lost, damaged, or stolen. The SEC’s Crypto Asset Custody Basics for Retail Investors outlines these trade-offs.
| Choice | Online exposure | Convenience | Key control | Physical and recovery considerations | Upkeep and cost |
|---|---|---|---|---|---|
| Hot wallet | Keys are on an internet-connected device, increasing cyber exposure. | Generally suited to regular spending and transfers. | You control the keys if it is self-custodial; a custodial service controls them on your behalf. | Device compromise or loss can put access at risk; a suitable backup is still essential. | Keep the device and wallet software updated. Costs vary by wallet and are not stated in the cited guidance. |
| Cold wallet | Keys are kept offline, reducing exposure to online attacks. | Less convenient for routine transactions. | You control the keys in a self-custody setup. | The device or backup can be lost, damaged, or stolen; recovery depends on the wallet’s backup design. | Physical devices may require secure setup and maintenance. Costs vary and are not stated in the cited guidance. |
These are general trade-offs, not a universal ranking. Bitcoin.org advises keeping only small amounts on internet-connected phones or computers for everyday use and storing remaining funds in a safer environment. That is general educational guidance, not a fixed percentage or personalized allocation.
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Where a hardware wallet fits
A hardware wallet is a physical device designed to keep private keys offline while allowing transactions to be signed. Bitcoin.org describes hardware wallets as a balance of security and ease of use. They do not remove the need for a backup, careful setup, or secure recovery. Obtain a device through a trustworthy channel, follow its official setup instructions, and review transaction details on the signing device before approving them. Cold devices can still be lost, damaged, or stolen.
When more complex setups may make sense
Technically capable users with a higher threat model may consider offline transaction signing or multisignature. A multisignature policy requires multiple independent approvals, which can reduce reliance on one device or location. It also adds setup and recovery complexity. Some descriptor wallet policies need a policy backup in addition to the seed phrase; losing that information can make funds unrecoverable. BIP 388 describes these policy-backup and signer-verification concerns: BIP 388. Multisignature is not an automatic upgrade for beginners.
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What is a recovery phrase (seed phrase)?
A recovery phrase is information a compatible wallet can use to restore access to keys and addresses. It is not a customer-support password. Anyone who obtains it may be able to access the corresponding bitcoin, so never share it—not even with someone claiming to be wallet support—and never enter it into a website or message in response to an unsolicited request. Bitcoin.org’s Bitcoin FAQ warns against storing the phrase as a photo or in cloud storage.
Bitcoin’s developer documentation describes common mnemonic formats as 12, 15, 18, 21, or 24 words, encoding 128, 160, 192, 224, or 256 bits of entropy, respectively. These are technical format details, not instructions to shorten, alter, or improvise a phrase. Use the exact recovery information generated by your wallet and its official recovery process. See Bitcoin Developer Documentation: Wallets.
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Use the backup method that matches the wallet’s design; a seed phrase is not necessarily a complete backup for every wallet. Most modern deterministic wallets can derive past and future addresses from a recovery phrase, but some older wallets or more complex policies may require additional backup information. Bitcoin Core’s wallet documentation notes that backup age can also affect metadata such as labels. Check your wallet’s official instructions rather than applying one generic procedure. Bitcoin Core contributors explain backup and restoration differences in Managing wallets.
- Follow the wallet’s official setup instructions. Create or record the backup as directed by the wallet software or device maker; do not use a phrase supplied by another person.
- Keep it private and offline. Store the recovery information somewhere secure and away from casual access. Do not photograph it, upload it to cloud storage, send it in a message, or type it into a support form.
- Plan for physical loss and disasters. Consider whether one location creates a single point of failure and whether multiple secure physical locations are appropriate. More copies also mean more opportunities for someone else to find the phrase.
- Understand recovery before relying on it. Learn the wallet’s documented restore process. Where practical, confirm that the backup is legible and complete without exposing it to an untrusted device, person, or service.
- Record additional policy information when required. For descriptor wallets or other complex setups, follow the wallet’s instructions for backing up the policy and verifying it on signers. A seed phrase alone may not be enough to rediscover a policy holding funds.
How do I protect myself from scams?
- Never reveal your recovery phrase. Legitimate support should not ask for it. Treat any request to share or enter it as a serious warning sign.
- Use official software and update channels. Keep wallet and device software current to receive security fixes, and obtain updates from the wallet’s official source.
- Protect passwords and passphrases. A forgotten wallet password or passphrase may permanently block access. Use a strong one and store or memorize it securely; understand whether the wallet’s recovery method restores access if it is forgotten.
- Verify before sending. Check the recipient address and transaction details on the device used to approve the transaction. Bitcoin transactions generally cannot be reversed if sent to the wrong destination.
- Plan inheritance carefully. Make sure trusted heirs can learn how to access the recovery arrangement when needed, without exposing credentials prematurely.
How to choose a setup for your circumstances
The right arrangement depends on how often you transact, what devices and backups you can protect, and how much complexity you can reliably manage. Consider these questions before choosing:
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- Do you need frequent access, or is the wallet mainly for longer-term storage?
- Can you keep an offline recovery backup private and recover from it if a device fails?
- Could a fire, theft, or loss at one location destroy both the wallet and its backup?
- Will you reliably manage updates, passwords, and any additional policy backups?
- Can you explain the recovery process to a trusted heir without giving away the credentials now?
For many people, keeping routine spending funds in a hot wallet and storing savings with an appropriately backed-up offline setup is a practical starting point. The amount to keep in each is a personal decision, not a universal percentage. More complex arrangements can address particular risks but create more ways to make a recovery mistake.
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