How to self-custody bitcoin, step by step
Get your bitcoin off the exchange and into a wallet only you can spend from.
To self-custody bitcoin, buy a Bitcoin-only hardware wallet from its maker, let it generate a seed phrase, and back that phrase up on paper or metal. Then verify a receive address on the device screen, send a small test amount from your exchange, and move the rest once the test arrives. From then on, no company can freeze, lend, or lose your bitcoin for you.
Disclosure: I work at Blockstream, the company that makes the Jade wallets mentioned here. I joined after many years as a satisfied user. There are no affiliate links on this site.
What self-custody means
When you buy bitcoin on Coinbase, Cash App, or Robinhood, the company holds it for you. Coinbase says so in its own help center: once you buy on Coinbase.com, your crypto is stored on the platform. What you hold is an account balance, and it comes with conditions.
Coinbase lists the cases where it will freeze customer funds: an order from a court or other authority, or a sanctions program such as those run by the US Treasury. It can also close accounts that break its user agreement. None of that applies to a wallet where you hold the keys.
Self-custody means the private keys that can spend your bitcoin live on a device you own, and the backup of those keys is a seed phrase only you have seen. For background on the phrase, read what is a seed phrase first.
| Exchange account | Self-custody | |
|---|---|---|
| Who holds the keys | The company | You |
| Can it be frozen | Yes, under court orders or sanctions, and the company can restrict or close accounts under its terms | No one can freeze an address you control |
| If you forget your password | Support can reset it | Your seed phrase restores everything |
| If you lose the backup | Not your problem | Make a new one while the device still works; lose both and your bitcoin is gone |
| What a data breach exposes | Your ID, address, and balance | Nothing, unless you gave your details to a store or exchange |
What you need before you start
You need three things: a hardware wallet, something to write the seed phrase on, and a desktop or phone app to see your balance and build transactions. The hardware wallet signs, and the app only watches and asks.
For the hardware wallet, buy Bitcoin-only and buy it from the maker, never a third-party marketplace listing. Good choices today: SeedSigner if you are happy to assemble parts, Blockstream Jade at $79 list, Jade Plus from $149, or the BitBox02 Bitcoin-only edition at $167. My full rankings are on /wallets, and /budget covers the cheap end.
For the backup, the card in the box works for day one, but plan to move the words onto steel. My seed storage page ranks the plates worth buying. For the app, Sparrow Wallet on a desktop works with every wallet above.
How to set up self-custody, in order
- 1Unbox the hardware wallet and check it is genuine using the maker's own check. Jade Plus, for example, has Blockstream's Genuine Check for this.
- 2Create a new wallet on the device and let the device generate the seed phrase. Never use a seed phrase that came printed in the box or from a website. My seed phrase generator guide explains why, and how dice rolls work if you want to add your own randomness.
- 3Write the 12 or 24 words in order, with their numbers, and check each one against the screen. If the device quizzes you on the words at the end of setup, pass it. The BitBox02 saves its backup to a microSD card by default, and you can show the words on the device afterward to write them down.
- 4Set a PIN (the BitBox02 calls it a device password; SeedSigner keeps nothing between sessions, so it has none). Decide now whether you want a passphrase. It adds protection against someone finding your words, and it adds a second thing you can lose.
- 5Connect the wallet to Sparrow or the maker's app and open the receive screen. Have the hardware wallet display the same address and compare every character. The device screen is the one to trust.
- 6Send a small test amount from your exchange to that address. My step-by-step withdrawal guide covers Coinbase, Cash App, and Robinhood screen by screen.
- 7Once the test shows up, do a recovery test: reset the device (or take a second one), restore it from your written words, and confirm the same address and balance appear.
- 8Send the rest. Then copy your seed phrase onto metal and store it where a fire, flood, or curious guest will not reach it. My backup guide covers paper versus metal and where to keep it.
Why exchange risk is about more than bankruptcy
Besides the company going under, exchange risk includes the customer file. In May 2025 Coinbase disclosed that criminals paid overseas support staff to copy customer data. According to Coinbase's blog and SEC filing, the stolen data included names, addresses, phone numbers, emails, government ID images, and balance snapshots with transaction history, and the company put the cost at $180 million to $400 million.
No passwords or private keys were taken. Coinbase said the attackers wanted a contact list for impersonating Coinbase and tricking people into handing over their coins, and a list that pairs home addresses with balances also tells a robber where to go. Self-custody does not erase what an exchange already knows about you, but bitcoin you withdraw stops showing up in their future balance snapshots. My privacy basics guide covers how to keep the trail short from here.
Mistakes that lose bitcoin
- Photographing the seed phrase, typing it into a phone, or saving it in a cloud note, where a breach or malware can expose it.
- Buying a hardware wallet secondhand or from an unofficial reseller. You cannot tell if someone has already seen the seed.
- Skipping the address check on the device screen. Malware on a computer can swap a copied address.
- Skipping the recovery test. A misspelled word is cheap to find in week one and very expensive to find in year five.
- Telling people how much you hold. Self-custody removes the company as a target and can make you the target instead.
- Leaving no instructions for your family. My inheritance guide covers a simple letter of instruction.
Where to go after the basics
Once your bitcoin is on a hardware wallet with a tested backup, you are ahead of most holders. The next upgrades are optional and come in roughly this order.
Run your own node so your wallet stops asking someone else's server about your addresses. Sparrow's docs warn that a public server sees your public key information. See how to run a Bitcoin node and Start9 vs Umbrel.
Learn what a UTXO is so you can control which coins you spend. For larger amounts, consider a 2-of-3 multisig so one lost or stolen device cannot cost you anything. And know your plan for a lost or broken hardware wallet before you need it.
Frequently asked questions
What is a self-custody wallet?
A self-custody wallet is one where you hold the private keys, usually backed up as a 12 or 24 word seed phrase. No company can freeze it or spend from it. A hardware wallet is the safest kind, because the keys never touch an internet-connected device.
Is self-custody safer than keeping bitcoin on an exchange?
It removes the company as a point of failure: no freezes, no account closures, and no balance sitting in a customer database. It makes you responsible for the backup instead. With a hardware wallet and a tested seed phrase backup, that is a trade I would make every time.
How do I self-custody bitcoin from Coinbase or Robinhood?
Set up your hardware wallet, get a receive address from it, and use the exchange's send or withdraw screen to send bitcoin to that address. Robinhood only sends to addresses starting with 1, 3, or bc1q, so pick a native SegWit address. My withdrawal guide walks through each app.
Can I self-custody bitcoin on my phone?
Yes, with a mobile wallet that gives you the seed phrase. That is fine for spending money. For savings, use a hardware wallet, because a phone is online all the time and runs many other apps. See my software wallet rankings.
What if my hardware wallet company goes out of business?
Your bitcoin is fine. Your words follow BIP39, a standard shared by Jade, BitBox02, SeedSigner, and many other hardware wallets, so they restore in Sparrow or another hardware wallet. Write down your address type and any passphrase so the restore finds your coins.
Is "self custody crypto" different from self-custody bitcoin?
The idea is the same, but I only cover bitcoin. Multi-coin wallets carry far more code to support other tokens, and every extra line is attack surface you do not need for bitcoin. My Bitcoin-only explainer covers the reasoning.