Where is cryptocurrency stored? Keys, wallets and blockchains
Cryptocurrency sits on a blockchain, while a wallet holds the keys that control it. Custody and seed backups decide who can reach the funds safely.
Vahe HakobyanEditor-in-chief
Updated Oct 5, 20263 min readFact-checked
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That record is maintained by a network of computers. The Ethereum blockchain works the same way, recording ownership on many computers.
What does a crypto wallet hold?
A wallet stores the private keys or seed phrase that control your coins. A private key is a long code that authorizes transfers. A seed phrase is a list of words that can rebuild those keys. In a custodial wallet, a company holds the keys for you; in a self-custody wallet, you hold them.
Hot wallets vs cold wallets
Hot wallets connect to the internet, usually through a phone or computer. Cold wallets keep private keys offline, often on a hardware device. Both types can hold keys for the same blockchains, but hot wallets expose keys to online threats.
How do you recover access?
Your seed phrase can restore access if you lose a device or wallet. It works because the seed phrase recreates the private keys. Anyone who finds the phrase can also use it, so keep it offline and private.
What are the main risks?
The main risk is losing access. If you lose your keys and have no backup, the funds are usually unreachable. An exchange can also fail, freeze withdrawals or file for bankruptcy, as FTX did in November 2022. Sending crypto to the wrong address or network can make funds hard or impossible to recover.
- Lost keys or seed phrase can permanently block access to funds.
- Exchange failure or bankruptcy can trap balances for a long time.
- Wrong address or network sends can make recovery difficult or impossible.
- Phishing sites and fake wallets can steal your keys.
- Malware on a hot wallet device can capture keys or seed phrases.
Frequently asked questions
A bank account holds dollars, not cryptocurrency. Some banks offer crypto custody through a partner, but that is not a bank deposit and usually lacks FDIC insurance.
If you have no other backup, you lose the ability to control the coins and the funds are usually unreachable. A custodial account may still be recovered through the company.
No. The blockchain records ownership, and the wallet app holds the keys that control the coins.
Not automatically. An exchange can help with account recovery, but it can also freeze withdrawals or fail. Self-custody removes that company risk, but a lost seed phrase can still lock you out.
