You control the keys
With self-custody, you control the private keys or seed phrase. This gives direct ownership, but also full responsibility for security, backups, and mistakes.
Crypto Basics · Lesson 4
Wallets and custody: who really controls the asset?
A crypto wallet does not “store” coins like a normal app stores files. It controls access to blockchain assets through private keys, seed phrases, and signing permissions.
An exchange controls access
On a centralised exchange, the platform usually controls the private keys. You have an account balance, but withdrawals depend on the platform’s systems and rules.
The most important rule
Whoever controls the private key controls the crypto. If you lose your seed phrase, share it with a scammer, or sign a malicious transaction, there may be no bank or support team that can reverse it.
Seed phrase
A recovery phrase that can restore wallet access. It must be stored offline and never shared.
Private key
The secret cryptographic key that proves ownership and allows transactions to be signed.
Public address
The address you can share to receive funds. It is not the same as your private key.
Hot wallets vs cold wallets
Hot wallets are connected to the internet and are convenient for frequent activity. Cold wallets keep keys offline and are usually preferred for long-term storage. The trade-off is convenience versus security. Active traders may use hot wallets, while long-term holders often separate storage from trading activity.
Common custody mistakes
Common mistakes include saving seed phrases in screenshots, typing seed phrases into fake websites, approving unlimited token permissions, using unknown wallet apps, and keeping all funds on one exchange or wallet. Good custody is about reducing single points of failure.
Practical custody checklist
Use strong account security, enable two-factor authentication on exchanges, verify URLs carefully, keep seed phrases offline, test small transactions first, and separate long-term storage from active trading wallets.
Apply this in real market conditions
Use Coinstrooper’s live market tools to connect this lesson with real crypto data.
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