Never Do These Things With Your Crypto Wallet

The number of hacks reported recently in the crypto market is alarming.

It appears like exploits happen every week. From the $285 million Drift Protocol drain to the $11 million Verus-Ethereum bridge hack, the scale of losses has shaken even the most experienced investors. With these disturbing events, industry participants have resumed a saying that never goes out of style — not your keys, not your coins.

Those words serve as a reminder to use a personal wallet because leaving assets with exchanges has repeatedly ended badly. But crypto wallets, while a far better option than keeping everything on an exchange, are not immune to attacks either. The security of your wallet depends almost entirely on your own behavior.

Here are the things you must never do with your crypto wallet because one mistake can cost you everything.

1. Never Share Your Seed Phrase With Anyone

This is the most important rule in crypto security and the one most frequently violated.

Your seed phrase — the 12 or 24 words generated when you create a wallet is the complete master key to everything inside it. Whoever has those words has total, irreversible control over your funds. Not a password you can reset. Not an account you can recover. It’s gone permanently.

No legitimate wallet provider, exchange, customer support agent, moderator, or developer will ever ask for your seed phrase. Not once. Not ever. Under any circumstances.

The most common attack is fake customer support. You post in a Telegram group or Twitter (X) comment about a wallet issue. Within minutes someone posing as official support replies, walks you through a “verification process,” and asks for your seed phrase. By the time you realize what happened your wallet is empty.

Write your seed phrase on paper. Store it somewhere physically secure. Never photograph it, type it into any website, or share it with any person for any reason.

2. Never Store Your Seed Phrase Digitally

Writing your seed phrase in your notes app, saving it in Google Drive, screenshotting it, or emailing it to yourself feels convenient. It is also one of the fastest ways to lose everything.

Digital storage means your seed phrase is accessible remotely. If your phone is hacked, your email is compromised, or your cloud storage is breached, your seed phrase goes with it. Hackers specifically target notes apps and cloud storage because they know this is where careless users store sensitive information.

The only safe storage for a seed phrase is physical, that is pen and paper, stored somewhere secure and separate from your device. Some people use a fireproof safe. Others engrave it on metal for durability. Whatever method you choose, keep it offline and keep it private.

3. Never Use a Wallet You Downloaded From an Unofficial Source

Fake wallet apps are one of the most sophisticated and devastating scams in crypto. Attackers create near-perfect replicas of popular wallets like Trust Wallet, MetaMask, Exodus with identical logos, names, and interfaces. When you set up the fake wallet and it generates your “seed phrase,” that phrase is immediately transmitted to the scammer. Every coin you deposit goes directly into their control.

So, always download wallet apps directly from the official website of the wallet provider. Never through a link someone sent you in a Telegram group, a WhatsApp message, or a X DM. Not even if the link looks legitimate.

Before downloading any wallet, verify the URL manually. Check that it matches the official website exactly. One misplaced letter in a URL like “myetherwalet.com” instead of “myetherwallet.com” is the difference between safety and losing everything.

4. Never Connect Your Wallet to Unverified Sites

Decentralized finance requires you to connect your wallet to websites to access protocols, swap tokens, or claim rewards. This is normal. What is not normal is connecting your wallet to a site you haven’t verified carefully.

Phishing websites mimic legitimate DeFi platforms with frightening accuracy. They copy the same design, same color scheme, same layout, slightly wrong URL. When you connect your wallet and approve a transaction on a phishing site, you may be signing a permission that gives the attacker unlimited access to drain your entire wallet.

Before connecting your wallet to any site, check the URL character by character. Bookmark the legitimate versions of sites you use regularly so you always access the right one. If a site asks for permissions that seem excessive like access to all tokens in your wallet rather than just the one you’re interacting with, reject it immediately.

5. Never Keep Large Amounts on a Hot Wallet

A hot wallet is any wallet connected to the internet. The apps on your phone or browser extensions like MetaMask. They are convenient for daily transactions and small amounts but they are permanently exposed to online threats.

Keeping your entire crypto portfolio on a hot wallet because it is convenient is the equivalent of keeping all your cash in your pocket rather than a bank. If your device is compromised through malware, a phishing attack, or a SIM swap, everything in that hot wallet is at risk.

For significant amounts you are holding long-term, a cold wallet (a hardware device like a Ledger or Trezor that stores your private keys offline) is the appropriate tool. Cold wallets are not connected to the internet which means they cannot be remotely accessed no matter what happens to your phone or computer.

The simple rule is this: use your hot wallet for what you are actively trading or spending. Move everything else to cold storage.

6. Never Approve Transactions You Don’t Fully Understand

When you interact with a DeFi protocol your wallet will ask you to approve a transaction or sign a message. Most people click approve without reading what they are actually authorizing.

Some approvals are straightforward eg send this amount of this token to this address. Others are complex permission grants that give a smart contract ongoing access to your wallet’s funds. Approving the wrong contract can result in a complete drain of your wallet days or even weeks after you’ve forgotten the interaction.

Before approving any transaction, read it carefully. If the permission seems broader than what the action requires, if it asks for unlimited access rather than a specific amount, reject it. Use a tool like Revoke.cash regularly to audit and cancel unnecessary token approvals you may have already granted.

7. Never Use Public WiFi to Access Your Wallet

Public WiFi networks at cafes, airports, hotels, and co-working spaces are hunting grounds for attackers running man-in-the-middle attacks — where they intercept the data flowing between your device and the internet.

Accessing your crypto wallet on public WiFi means your transaction data, wallet addresses, and potentially your private information are visible to anyone on the same network with the right tools.

If you must access your wallet outside your home network, use your mobile data instead. It is significantly more secure than public WiFi for sensitive financial activity. If you regularly work from public networks, a reputable VPN adds an important layer of protection.

8. Never Ignore Wallet Updates

Wallet developers release updates regularly not just to add features but to patch security vulnerabilities. Running an outdated wallet version means you may be exposed to known security flaws that have already been fixed in newer releases.

Enable automatic updates for your wallet apps or check for updates regularly. This is one of the simplest and most overlooked security practices in crypto. A vulnerability that exists in an old version and has been patched in the current one is only dangerous to people who didn’t update.

9. Never Give Anyone Remote Access to Your Device

This sounds obvious until you are in a stressful situation where you think you have lost access to funds and someone friendly offers to help by remotely accessing your computer.

Remote access scams are devastatingly effective because they happen when people are already anxious. Someone contacts you claiming to be from wallet support, gains your trust, and asks to share your screen or install remote access software to help resolve the issue. The moment they have access to your device they can see your seed phrase, copy your private keys, and drain your wallet — often while you watch helplessly.

No legitimate wallet support operates this way. If anyone ever asks for remote access to your device in the context of crypto support, end the conversation immediately.

10. Never Assume You Are Too Small to Be Targeted

A common misconception among Nigerian crypto users with modest portfolios is that hackers only target large wallets. This is not how most crypto theft works.

Automated scripts scan for exposed seed phrases, vulnerable wallets, and careless approvals at scale. They do not discriminate by portfolio size. A wallet with ₦50,000 worth of USDT is just as vulnerable to an automated attack as one with ₦5 million.

Every crypto user is a potential target regardless of how much they hold. The behaviors described in this article are not optional security measures for high-net-worth investors. They are the minimum standard for anyone who holds crypto at any level.

Conclusion

The hacks making headlines right now are a reminder that crypto security is not a one-time setup. It is an ongoing practice. The industry saying is true: not your keys, not your coins. But having your keys is only half the battle. Protecting them is the other half.

The good news is that most successful crypto wallet attacks exploit human behavior rather than technical vulnerabilities. Which means most of them are preventable by you, right now, without any special technical knowledge.

Review your current practices against this list. Fix what needs fixing. And make these habits non-negotiable.

A professional crypto and finance writer covering blockchain news, security, and financial education daily at CoinTab.

Never Do These Things With Your Crypto Wallet was originally published in Coinmonks on Medium, where people are continuing the conversation by highlighting and responding to this story.