How does a crypto wallet work?

If you're new to crypto, the concept of a "wallet" can feel confusing. Unlike a regular wallet, a crypto wallet doesn't actually hold any coins. Instead, it stores the keys that prove you own them. Understanding how a crypto wallet works is one of the first steps toward investing safely in digital assets - and it also helps clarify what kind of setup makes sense for you.

What is a crypto wallet, exactly?

A crypto wallet is a tool that stores your private keys - the secret codes that let you access and control your cryptocurrency on the blockchain. The coins themselves never leave the blockchain. What moves between wallets is the right to control them.

Think of it like a mailbox. Your wallet address (public key) is the mailbox number - anyone can send crypto to it. Your private key is the physical key to that mailbox - only you should have it. If someone else gets your private key, they can access everything inside.

Every crypto wallet has two components:

• Public key - a shareable address others use to send you crypto (like an email address)
• Private key - a secret code that authorises transactions from your wallet (like a password you must never share)

When you send crypto, your wallet uses the private key to sign the transaction. The blockchain then verifies the signature and updates the record. No bank, no middleman - just cryptographic proof.

What are the different types of crypto wallets?

Crypto wallets come in several forms, each with different trade-offs between security and convenience.

Hot wallets are connected to the internet. They include browser extensions (like MetaMask), mobile apps, and desktop software. Hot wallets are easy to use, but their internet connection makes them more exposed to hacks and phishing attacks.

Cold wallets store your private keys offline. Hardware wallets - physical USB-like devices such as a Ledger or Trezor - are the most common type. Because they're never connected to the internet during normal use, they're significantly harder to compromise. Cold wallets are the preferred choice for large holdings or long-term storage.

Paper wallets are a simpler (and older) form of cold storage - your keys printed on paper. They're secure from online attacks, but easy to lose or damage physically.

Here's a quick comparison:

Wallet typeConnected to internetSecurity levelBest forHot wallet (app/extension)YesMediumActive trading, small amountsExchange accountYes (managed by exchange)High (if exchange is reputable)Beginners, platform usersHardware wallet (cold)NoVery highLarge holdings, long-term storagePaper walletNoHigh (but fragile)Offline backup

What is the difference between custodial and non-custodial wallets?

This is one of the most important distinctions in crypto - and it's often misunderstood.

A custodial wallet means a third party (usually an exchange like Binance or Kraken) holds your private keys on your behalf. You log in with a username and password. The exchange controls the keys, and therefore the assets. You trust them to keep your funds safe and available. This is the default setup for most beginners - when you buy crypto on an exchange, you're using a custodial wallet unless you withdraw to an address you control.

A non-custodial wallet means you hold your own private keys. Nobody else can access your funds - but that also means nobody can help you if you lose them. Lose your private key or seed phrase, and your crypto is gone permanently.

The phrase "not your keys, not your coins" is widely used in the crypto community for a reason. Exchange failures - like the collapse of FTX in 2022 - showed what can happen when users trust a custodian that turns out to be unreliable. On the other hand, self-custody comes with real responsibility. Investopedia estimates that millions of Bitcoin have been lost forever due to lost private keys.

The right choice depends on your priorities: convenience and simplicity (custodial) versus full control and self-reliance (non-custodial).

Do you actually need a crypto wallet to invest in crypto?

Not necessarily - and this is where things get more practical.

If you're investing through a platform like Diamond Pigs, your crypto stays in your exchange account the entire time. Diamond Pigs connects to your exchange via API (application programming interface), which means it can place buy and sell orders on your behalf without ever touching your private keys or moving your funds off the exchange.

This is a non-custodial model at the platform level: Diamond Pigs doesn't hold your assets, can't withdraw them, and doesn't have access to your keys. Your crypto remains on your chosen exchange - Binance, Kraken, Bybit, or others - while automated strategies run 24/7 in the background. You keep full control of your account, and Diamond Pigs only has permission to execute trades in the spot wallet. You can learn more about how this model works on the Diamond Pigs platform.

For most investors, this setup removes the need to manage a separate self-custody wallet. The exchange acts as a secure custodian, and the platform handles the investing logic.

If you're planning to hold large amounts of crypto long-term outside of any platform, a hardware wallet is worth considering. But for actively managed, automated strategies, keeping assets on a reputable exchange is both practical and secure.

What is a seed phrase and why does it matter?

When you set up a non-custodial wallet, you're given a seed phrase - usually 12 or 24 random words. This phrase is a human-readable version of your private key. It can restore your wallet on any device if your hardware is lost, stolen, or damaged.

Treat your seed phrase like the master key to a safe deposit box. A few rules that matter:

• Never store it digitally (no photos, no cloud storage, no notes apps)
• Write it on paper and keep multiple physical copies in secure locations
• Never share it with anyone - no legitimate service will ever ask for it
• If someone has your seed phrase, they have full access to your wallet

Phishing attacks that target seed phrases are one of the most common forms of crypto theft. Being aware of this is the first line of defence.

How do you choose the right wallet setup?

The best wallet setup depends on how you plan to use crypto and how much you're comfortable managing yourself.

For most people getting started with crypto investing, an exchange account on a regulated, reputable platform is the simplest and most practical starting point. It provides custodial security, easy access, and compatibility with platforms like Diamond Pigs. If you're new to the space, there's no need to rush into self-custody before you understand the risks.

As your holdings grow, you might consider moving a portion to a hardware wallet - particularly any amount you don't plan to trade or invest actively. Many experienced investors use a layered approach: active funds on an exchange for trading and automation, long-term reserves in cold storage.

For platform-based investing, the Diamond Pigs risk management approach is built around keeping your assets secure while automated bots handle market decisions. The API connection model means you don't need to hand over keys or transfer funds - you simply connect your exchange account and let the strategy run.

Key takeaways

• A crypto wallet stores private keys, not coins - the coins always live on the blockchain.
• Public keys are shareable addresses; private keys must be kept secret at all times.
• Hot wallets are internet-connected and convenient; cold wallets are offline and more secure for large holdings.
• Custodial wallets (exchange accounts) are managed by a third party; non-custodial wallets give you full control and full responsibility.
• Platforms like Diamond Pigs use an API model - your crypto stays on your exchange, and the platform never holds or moves your funds.
• For most investors using an automated platform, managing a separate self-custody wallet is not required.
• If you do use a non-custodial wallet, protect your seed phrase as carefully as you'd protect any critical document.

Frequently asked questions

What does a crypto wallet actually store?

A crypto wallet stores your private keys - the cryptographic codes that prove you own your crypto. The coins themselves are recorded on the blockchain. The wallet is the tool that lets you access and control them.

Is it safe to keep crypto on an exchange?

It depends on the exchange. Reputable, regulated exchanges with strong security track records (Binance, Kraken, Bybit, Crypto.com) offer a high level of protection for most users. The key risk is exchange failure or hack - which is why choosing a well-established platform matters. For very large holdings, many investors also keep a portion in cold storage.

What is the difference between a hot wallet and a cold wallet?

A hot wallet is connected to the internet - this includes exchange accounts and mobile wallet apps. A cold wallet is offline, typically a hardware device like a Ledger or Trezor. Cold wallets are more secure against online attacks but less convenient for frequent trading.

Do I need a crypto wallet to use Diamond Pigs?

No. Diamond Pigs connects to your existing exchange account via API. Your crypto stays on the exchange at all times - Diamond Pigs only places buy and sell orders and cannot withdraw or transfer your funds. You don't need to set up or manage a separate wallet.

What happens if I lose my private key?

If you lose your private key and don't have your seed phrase, your crypto is permanently inaccessible. There is no password reset and no customer support that can recover it. This is why storing your seed phrase securely is critical for anyone using a non-custodial wallet.

What is the safest type of crypto wallet?

For long-term storage of significant amounts, a hardware wallet (cold wallet) from a trusted manufacturer like Ledger or Trezor is generally considered the most secure option. For active investing through a platform, a reputable exchange combined with platform-level automation (like Diamond Pigs) offers a practical and secure alternative without the complexity of self-custody.

Glossary

Blockchain - a decentralised, public ledger that records all cryptocurrency transactions. It cannot be altered once a transaction is confirmed.

Private key - a secret cryptographic code that gives you the right to authorise transactions from your wallet. Never share it.

Public key - a shareable wallet address that others use to send you crypto. Think of it as your account number.

Seed phrase - a sequence of 12 or 24 words that can restore your wallet if your device is lost or damaged. Equivalent to your master private key.

Custodial wallet - a wallet where a third party (usually an exchange) holds your private keys on your behalf.

Non-custodial wallet - a wallet where you hold your own private keys and have full control - and full responsibility - for your funds.

Cold wallet / hardware wallet - an offline device that stores your private keys away from the internet, offering strong protection against online attacks.

Hot wallet - a wallet connected to the internet, offering convenience for everyday transactions but with higher exposure to online threats.

API (application programming interface) - a secure connection that lets one software system interact with another. Diamond Pigs uses API connections to place trades on your exchange without accessing your private keys or funds directly.