Crypto wallets: keys, not coins
Every crypto balance is recorded on a blockchain, and control over it comes from a private key.
A wallet stores that key, or the recovery phrase that can recreate it, and uses it to sign transactions.
Whoever controls the key controls the coins, which is the single most important idea in crypto security.
Custodial and self-custody crypto wallets
| Custodial (exchange) | Self-custody | |
|---|---|---|
| Who holds the keys | The exchange | You |
| If you forget your password | Account recovery through the provider | Restore with your recovery phrase |
| If the provider fails | MiCA requires segregation, but access can be delayed | Not affected |
| If you lose the recovery phrase and device | Not applicable | Coins usually lost |
| Main threats | Account takeover, provider failure | Phishing, malware, lost phrase |
Types of crypto wallets
Which crypto wallet suits you?
The wallet finder asks six questions and suggests a type.
| Situation | Often suitable |
|---|---|
| Small amount, beginner | Authorised exchange with strong account security |
| Everyday amounts, regular use | Reputable software wallet |
| Larger amount, long term | Hardware wallet |
Crypto wallets and MiCA
MiCA regulates custody when a provider holds crypto on behalf of clients: client crypto-assets must be segregated from the provider's estate, and the custodian is liable for losses caused by incidents attributable to it, up to market value.
A self-custody wallet is software or hardware you control, and MiCA's custody rules do not cover your own mistakes with it.
Rules for any of your crypto wallets
- Never share your recovery phrase or private key with anyone.
- Download wallets only from the official source.
- Test the recovery and send a small amount first.
- Plan what happens to the coins if something happens to you.
Crypto wallets: hot and cold
Crypto wallets are often described as hot or cold, depending on whether the keys are on an internet-connected device.
| Hot wallet | Cold wallet | |
|---|---|---|
| Where keys live | A phone, computer or browser | An offline device or paper |
| Convenience | High: send at any time | Lower: device needed for each transaction |
| Exposure to malware and phishing | Higher | Lower |
| Typical use | Everyday amounts | Long-term holdings |
Many people use both: a hot wallet for small amounts and a cold wallet for savings.
Crypto wallets: what the address is
A wallet address is a public identifier, derived from your keys, that others use to send you crypto.
Sharing an address is safe; sharing a private key or recovery phrase is not.
Each blockchain has its own address format, and some wallets show different addresses for different networks, which is why the guide to withdrawing to a wallet stresses choosing the right network.
Crypto wallets and the travel rule
When you move crypto from an EU exchange to your own wallet, the Transfer of Funds Regulation applies to the exchange's side of the transfer.
For transfers exceeding EUR 1,000 to a self-hosted address, the exchange must assess whether you own or control the address, and it may ask you to prove it.
The guide to the crypto travel rule explains the details.
Crypto wallets: a setup checklist
- Choose the type: with the wallet finder.
- Get it from the official source: the maker's website or its linked app store listing.
- Create a new wallet: never use a phrase supplied by someone else.
- Write down the recovery phrase on paper and store it offline.
- Test the recovery with a small amount.
- Send a small test transfer before larger ones.
- Write an inheritance note, as the guide to crypto inheritance explains.
Crypto wallets: common ways people lose coins
| How coins are lost | Prevention |
|---|---|
| Recovery phrase typed into a fake site | Never type the phrase anywhere except when restoring on your own device |
| Phrase stored in the cloud and hacked | Keep it offline |
| Device and phrase both lost | Two secure copies of the phrase |
| Wrong network or address | Copy-paste, check, test transfer |
| Malicious approval in a wallet | Read and reject unclear signing requests |
Crypto wallets or an authorised exchange?
Self-custody is not automatically safer than an authorised exchange: it moves the risk from the provider to you.
For many beginners with small amounts, a MiCA-authorised exchange with strong account security is the simpler starting point, and self-custody can come later.
Crypto wallets explained step by step: sending and receiving
Sending and receiving with crypto wallets follows the same pattern whichever type you use.
- Receiving: open "Receive", choose the coin and network, and share the address or QR code.
- Sending: open "Send", paste the recipient's address, choose the network, enter the amount and review the fee.
- Confirming: the wallet signs the transaction with your key; on a hardware wallet you confirm on the device screen.
- Waiting: the blockchain records the transaction, which can take seconds or longer depending on the network.
- Checking: a block explorer shows the transaction by its ID.
Blockchain transactions cannot be reversed, so the address and network checks before sending are the only protection against a mistake.
Crypto wallets and network fees
Every transaction pays a network fee to the blockchain, separate from any exchange fee.
| What affects the network fee | Why |
|---|---|
| Which blockchain | Networks have different fee systems |
| How busy the network is | Higher demand raises fees on many networks |
| Transaction size or complexity | Some transactions use more network resources |
| Chosen speed | Some wallets let you pay more for faster confirmation |
Small balances can become uneconomical to move when fees are high, which is a reason to plan transfers rather than make many small ones.
Crypto wallets and tokens
Many crypto-assets are tokens issued on another blockchain rather than coins with their own network.
A wallet must support both the token and the network it lives on, and the network's own coin is usually needed to pay the fee.
That is why a wallet can show a token balance that you cannot send until you also hold a little of the network's coin.
Crypto wallets and connecting to apps
Software wallets can connect to online applications, which then ask the wallet to sign requests.
Some requests give an application permission to move tokens, and malicious sites use this to drain wallets.
- Connect only to applications you have checked independently.
- Read every signing request; reject anything you do not understand.
- Review and revoke old permissions using your wallet's tools where available.
- Keep long-term holdings in a wallet that never connects to applications.
Crypto wallets: costs compared
| Option | Upfront cost | Ongoing cost |
|---|---|---|
| Exchange custody | None | Usually none for holding; check for inactivity or custody fees |
| Software wallet | Usually free | Network fees when sending |
| Hardware wallet | Price of the device | Network fees when sending |
Moving coins from an exchange to a wallet also costs a withdrawal fee, which the fee calculator includes.
Crypto wallets when travelling or moving
A self-custody wallet works anywhere, because it is not tied to a country or a provider.
An exchange account, by contrast, depends on the exchange serving your country of residence, which under MiCA means the country must be in its passport notification, as the page on availability by country shows.
If you move, check your exchange's position before you go.
Crypto wallets for families
Families sometimes share access to a wallet, which raises questions of control and trust.
- Agree in writing who may move funds and when.
- Keep the recovery phrase where both trusted people can reach it if needed.
- Consider separate wallets for separate money.
- Plan for what happens if one person can no longer act.
Crypto wallets glossary in brief
| Term | Meaning |
|---|---|
| Private key | The secret that authorises spending |
| Public address | Where others send you crypto |
| Recovery phrase | Words that restore the keys |
| Block explorer | A website showing blockchain transactions |
| Signing | Approving a transaction with your key |
The full crypto glossary explains more terms.
Crypto wallets: choosing a reputable wallet
- A long public track record and an identifiable maker.
- Downloads only from official sources linked on the maker's own website.
- Support for the coins and networks you actually use.
- Clear backup and recovery through a standard recovery phrase.
- Readable signing screens that show what you approve.
Be careful with wallets recommended by strangers, in ads or in chat groups, which is a common route to fake apps.
Crypto wallets: moving between wallets
To move to a new wallet, create the new wallet with its own recovery phrase and send the coins from the old one, rather than importing the old phrase into a new app you are unsure of.
After moving, keep the old phrase safe until you are sure everything has arrived, then decide whether to retire it.
Crypto wallets and scams that target them
| Scam | How to recognise it |
|---|---|
| "Wallet validation" site | Asks for your recovery phrase |
| Fake support | Contacts you after you post about a problem |
| Airdrop or giveaway | Requires you to connect and sign unclear requests |
| Pre-configured hardware wallet | Arrives with a phrase already written |
The scam check covers these red flags.
Crypto wallets: what happens if the maker disappears
Because wallets use recovery phrases, your coins do not depend on the wallet maker staying in business.
Most wallets use common recovery phrase standards, so the phrase can usually be restored in other compatible wallets, but check compatibility before you need it.
Crypto wallets: a simple decision path
Most people can choose between crypto wallets by answering three questions in order.
First, how much is at stake: for a small amount, the convenience of an authorised exchange often outweighs the benefits of self-custody.
Second, how long you will hold: coins held for years benefit most from being stored offline.
Third, how confident you are with backups: self-custody is only safer if the recovery phrase is stored well.
If the amount is meaningful, the horizon is long and you can store a phrase safely, a hardware wallet is a common choice; otherwise an exchange with strong account security may be the better start.
Whatever you decide, the decision can change later as your amount and experience grow.
Crypto wallets and exchange accounts together
Many people use both: an exchange account for buying and selling, and a wallet for keeping.
In that setup, the exchange holds only what is needed for the next purchase or sale, and long-term holdings move to the wallet in occasional larger transfers.
This keeps exposure to any single provider small while limiting withdrawal fees.
It also means two sets of security to maintain: the exchange login and the wallet's recovery phrase.
Crypto wallets: frequently confused ideas
| Confusion | Clarification |
|---|---|
| "My coins are in the app" | The coins are on the blockchain; the app holds the keys |
| "Deleting the app deletes my coins" | No; the recovery phrase restores access in a new install |
| "The wallet company can reset my password" | Not for self-custody; only the recovery phrase can restore it |
| "An exchange account is a wallet" | It is an account with a custodian; the exchange holds the keys |
| "A hardware wallet cannot be phished" | You can still be tricked into revealing the phrase or signing a bad request |
Understanding these points prevents most of the costly mistakes people make with crypto wallets.
The crypto knowledge quiz includes questions on wallets and recovery phrases.
Crypto wallets: a note on privacy
Blockchains are public records, so anyone who knows your address can see its balance and transactions.
When you withdraw from an exchange to your own address, the exchange knows that the address is linked to you, and under the travel rule it may record that information.
Sharing an address with others, for example to receive a payment, also links it to you in their eyes.
For most people this is not a problem, but it is worth knowing that a wallet is not anonymous, and that showing a large balance publicly can attract unwanted attention.
Using a new receiving address where your wallet supports it, and not posting addresses or balances online, are simple habits that reduce this exposure.
Crypto wallets: a yearly wallet review
- Can you still open every wallet you use, and is the software up to date?
- Is each seed phrase backup still where you left it, readable and safe from fire and water?
- Does someone you trust know where to find instructions if something happens to you?
- Are coins you no longer trade moved out of exchange accounts, if that is your plan?
Reviewing crypto wallets once a year takes a few minutes and catches problems while they are still easy to fix.
Frequently asked questions
What are crypto wallets?
Software or devices that store the keys controlling your crypto and use them to sign transactions.
Do I need a crypto wallet?
Not necessarily. You can keep crypto at an authorised exchange. A wallet gives you control but also full responsibility.
What is the safest crypto wallet?
For larger long-term amounts, many people use a hardware wallet. The safest choice still depends on how well you protect the recovery phrase.
What happens if I lose my wallet?
You can restore it with the recovery phrase. Without the phrase, the coins are usually lost.
Does MiCA protect self-custody wallets?
MiCA regulates providers that hold crypto for clients. It does not cover your own mistakes with a wallet you control.
Sources
- Regulation (EU) 2023/1114 (MiCA), Article 75
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