Protecting cryptocurrency takes more than buying a hardware wallet. The main risks depend on where you keep your assets: exchange-account takeover, a compromised phone or computer, phishing, a malicious transaction approval, or a lost or exposed recovery phrase. Use the five steps below to reduce those risks and prepare for a mistake or compromise. Crypto transfers are generally difficult or impossible to reverse, so verify before you approve or send. (FTC guidance on cryptocurrency scams)
First, identify what you need to protect
An exchange account and a self-custody wallet have different security and recovery responsibilities. With an exchange, the platform controls the private keys and you protect your login credentials. With self-custody, you control the keys, commonly backed up by a recovery phrase. A hot wallet is software on an internet-connected device; a hardware wallet, also called a hardware signer, is designed to keep signing keys isolated from the connected computer or phone.
Your public address can be shared to receive funds, but public blockchain records may reveal balances and transaction relationships. Your private key or recovery phrase is secret: in self-custody, it may be sufficient to restore the wallet and control its assets. Losing it can mean losing access; disclosing it can let someone else take control. Recovery phrase formats vary, so do not assume every wallet uses the same number of words. (Coinbase’s custody explainer)
Crypto is not usually stolen by breaking a blockchain. Attackers more often exploit stolen credentials, deception, unsafe devices, or transactions that a user is tricked into authorizing. A hardware wallet can help protect keys from exposure to an internet-connected device, but it cannot decide whether a recipient or contract is trustworthy.
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- Effortlessly build your crypto portfolio via the all in one Ledger Wallet app: buy, sell, send, receive, swap, stake and more across popular blockchains. 15,000+ coins & tokens in a single dashboard. Keep a close eye on the market. Compare service providers. Track performance. Get timely alerts. Build your portfolio with confidence.
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- Genuine Check: confirm your signer is authentic during setup with the Ledger Wallet app.
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Step 1: Choose custody that fits the amount and how you use it
There is no universally safest wallet. A custodian can make account recovery and buying or selling easier, but you depend on the platform’s security, availability, withdrawal rules, and solvency. Self-custody gives you direct control of the keys, but you also own the backup, recovery, and transaction-verification work. Neither choice removes every risk.
| Use case | Possible approach | Main trade-off |
|---|---|---|
| Buying, selling, or moving money between crypto and fiat | Exchange account with strong account controls | Convenience and account recovery versus platform and credential risk |
| Small balance for frequent payments or routine activity | Reputable exchange or hot wallet | Ease of access versus greater exposure to online threats |
| Long-term holdings | Hardware-backed self-custody, if you can manage recovery safely | Reduced online exposure of keys versus greater personal responsibility |
| Frequent decentralized-app activity | Separate low-balance interaction wallet and savings wallet | Containment of some risks versus more accounts and backups to manage |
| Very large or shared holdings | Consider multisignature or professionally managed custody | Potentially less dependence on one key versus added cost, coordination, and recovery complexity |
A practical starting arrangement is an exchange account for transactions and fiat transfers, a small daily-use wallet, and a separate savings wallet that is rarely connected to websites. Keep only the amount needed for near-term use in the first two. Moving assets off an exchange does not remove risk: you become responsible for authentic software and devices, backups, address checks, access controls, and a plan for recovery or inheritance.
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Hardware-wallet makers describe their devices as keeping keys offline or on a dedicated device. That addresses key storage and signing, not every part of the workflow. Ledger describes verifying transactions on its device screen in its Bitcoin wallet workflow; Trezor describes its Safe 5’s on-device confirmations and security features on the product page. These are manufacturer descriptions, not proof that a device or its surrounding workflow is invulnerable.
Step 2: Harden the exchange account and the email behind it
An attacker who takes over the email account used for exchange recovery may be able to reset exchange credentials. Protect both accounts, and do not reuse passwords. A password manager can generate and store unique passwords; do not treat it as automatically appropriate for storing a crypto recovery phrase, which creates a digital copy and a new point of compromise.
Rank #3
- Proven security at scale: Over 9 years and millions of cards issued with no known remote hacks, while military‑grade EAL6+ security keeps your private keys locked inside the chip. Your cryptocurrencies stay strongly protected from online attackers.
- Tap once to manage your entire crypto wallet across 90 blockchains - no USB cables or Bluetooth, no batteries, no setup. Access 14,100+ coins & tokens, DeFi, NFTs, and staking instantly from your phone
- Smart backup: Use your second Tangem Wallet as your Backup keys with end‑to‑end encryption; no more papers, pictures. If one card is lost, the remaining can still restore full access, with an optional seed phrase available for advanced users.
- Engineered to last up to 25 years: Waterproof (IP69K), shockproof and tested for extreme temperatures from −25°C to 50°C. A durable cold wallet with long‑term protection and independently audited security.
- Trusted by 6 million users worldwide - buy, sell, swap, stake, and spend cryptocurrency directly. The secure offline storage wallet designed for how people actually use crypto wallets
- From an updated device you trust, set a unique, long password for the exchange and its associated email account.
- Where supported, register a FIDO2/WebAuthn security key or passkey. Register a second key and store it separately before you rely on the first.
- If a security key is unavailable or the service requires another factor, use an authenticator app rather than SMS where possible. Treat SMS as a weaker fallback because phone-number porting and SIM swaps can expose codes.
- Save account recovery codes offline, and confirm how account recovery works if a key or phone is lost.
- Enable withdrawal allowlists, login and withdrawal alerts, device approvals, and withdrawal delays where the platform offers them. Check whether SMS-based recovery can override stronger authentication.
- Review active sessions, connected applications, and API keys; remove anything you no longer use. Never approve a login or withdrawal prompt you did not initiate.
NIST says manually entered one-time passwords are not phishing-resistant: an impostor can relay a code to the real service. Cryptographic authenticators such as security keys offer stronger protection against that kind of phishing when the service supports them. A security key protects a wallet only if the wallet or its sign-in workflow specifically supports that authentication standard; it is not a replacement for a recovery phrase. (See NIST’s authenticator guidance.)
Step 3: Keep recovery phrases and private keys secret and recoverable
Never give a recovery phrase to customer support, a friend, or someone claiming to be a security investigator. Do not enter it into a website, chat, form, or unsolicited wallet-validation, migration, airdrop, or synchronization prompt. Follow only the wallet maker’s documented recovery procedure when you intentionally restore your own wallet. A legitimate support representative should not need your phrase to verify your identity.
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Buy a hardware device from its manufacturer or an authorized seller, initialize it yourself, and confirm that it generates its recovery phrase during setup. Do not use a device supplied with a prewritten phrase or buy a secondhand wallet. Verify addresses and transaction details on the device’s trusted display when the device supports that.
- Make a durable offline backup and protect it from theft, fire, water, and unauthorized access. A physical safe may reduce some risks but does not protect against every disaster or against someone who can access its contents.
- If losing the first backup would be unacceptable, keep a second copy in a separate secure location rather than placing all copies together.
- Do not store a phrase as a phone photo, cloud note, or ordinary computer file: synchronization or device compromise could expose it. A password manager offers convenience but makes the secret a digital target; weigh that trade-off rather than assuming it is equivalent to offline storage.
- Record non-secret recovery details, such as wallet type, supported networks, and any passphrase instructions, separately from the secret itself.
- Before putting significant value at risk, rehearse recovery using a spare device or a low-value test wallet. Confirm the restored public address, then secure or reset the test device as appropriate.
A device PIN protects access to that device; it does not replace the recovery phrase. If someone obtains the phrase, they may be able to restore the wallet elsewhere. A lost device may not expose funds if it is properly protected and the phrase remains secret, but exact protections differ by implementation. An optional passphrase can add another recovery secret—and another way to lose access if it is forgotten. NIST’s key-management guidance emphasizes deliberate protection, backup, and recovery of cryptographic key material.
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Step 4: Secure the device and inspect what you sign
Reduce device and software exposure
- Install operating-system, browser, wallet-app, and hardware-wallet firmware updates through official channels.
- Get wallet software from the vendor’s official site or a verified app-store listing; an app-store listing alone does not prove authenticity.
- Use a screen lock and full-disk encryption, and avoid wallet use on rooted or jailbroken devices.
- Keep crypto activity away from untrusted downloads, pirated software, risky browser extensions, and high-risk browsing. Remove extensions you do not need.
- Use a bookmark or type the official domain rather than following search ads or unsolicited links.
- Do not paste an address without checking it: clipboard malware can substitute an attacker’s address. Address poisoning can also place a lookalike address in transaction history.
Use a pre-transaction check
- Confirm the intended network; the same asset name or address format does not guarantee that two networks are interchangeable.
- Check the destination address on the hardware device or other trusted display. Compare several characters at the beginning and end, and the full address when practical.
- Confirm the amount and fee before signing or sending. For a new recipient or unfamiliar network, consider a small test transfer first.
- For a smart-contract interaction, understand what permission the signature grants. Prefer a limited token approval when available rather than unlimited access.
- Do not approve a signature request you cannot interpret. A wallet may show transaction data, but it cannot know whether the action matches your intent.
- Pause if a message creates urgency. Unexpected claims that your wallet is suspended, that you must pay to unlock a withdrawal, or that you should scan a QR code to secure funds are warning signs.
Phishing can arrive through websites, email, direct messages, fake support accounts, browser extensions, or QR codes. An attacker may also trick a user into signing a malicious contract approval or sending funds to the wrong address. The FTC warns that crypto transfers are generally difficult to reverse and describes impersonation and QR-code scams in its consumer guidance.
Step 5: Monitor access and plan for a bad day
Set up monitoring and records
- Enable alerts for logins, withdrawals, new devices, and API-key changes when available.
- Keep a private inventory of exchanges, wallet addresses, networks, devices, and where recovery materials are stored. Do not put secret phrases in that inventory.
- Review exchange activity, wallet connections, and token approvals periodically. Revoke unused approvals using a reputable tool reached through a verified source.
- For large transfers, build in a delay and an independent second check. A blockchain explorer can help you inspect public activity, but it cannot reverse a transaction.
- Document the official way to contact each exchange and the account-recovery steps for your devices and authentication methods.
If an exchange account may be compromised
- From a clean device, end unknown sessions, revoke unfamiliar API keys, and freeze withdrawals if the platform provides that option.
- Contact the exchange through its official support channel; do not use contact details sent by an unsolicited helper.
- Change the exchange and email passwords, replace compromised authentication methods, and review recovery settings.
- If a phone-number takeover is suspected, contact the mobile carrier through its official channel.
- Preserve suspicious emails, timestamps, transaction IDs, wallet addresses, and screenshots. Report the incident to relevant authorities and financial institutions.
If a recovery phrase may have been exposed
- Treat the wallet as compromised. On a trusted device, create a new wallet with a new phrase.
- Transfer assets to the new wallet, prioritizing valuable or liquid holdings. Verify the destination carefully before sending.
- Revoke approvals from the old wallet where possible, and do not reuse its exposed phrase.
- Do not wait for customer support to reset a self-custody wallet: the provider cannot replace the exposed secret or reverse a blockchain transaction.
If the hardware device is lost but the phrase is still secure
Obtain a replacement through an official channel and restore it only using the manufacturer’s documented process. Verify the restored addresses. If you cannot be confident the phrase remained private, create a new wallet and move the assets.
Make the plan usable for someone else
A recovery plan should say which wallets and services exist, where non-secret instructions are stored, what is needed to restore access, and who should be contacted if you are incapacitated. For shared or very large holdings, multisignature custody or professional management may reduce dependence on one key, but it adds coordination and recovery requirements. Test the arrangement with low-value assets and make sure a trusted person can follow the documented process without seeing a secret they do not need.
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