A crypto wallet is a tool for managing the credentials that authorise blockchain transactions. The assets are recorded on a network ledger; the wallet helps a user view addresses and sign instructions that can move those assets.
The key concept: credentials control access
A private key, seed phrase or another recovery credential can control access to assets associated with an address. Anyone who obtains it may be able to create transactions. This is why security guidance focuses on keeping recovery data private rather than treating a wallet app as a simple balance screen.
Private key
A secret credential used to authorise actions.
Seed phrase
Recovery words that can regenerate wallet access; never share them.
Public address
An identifier others can use to send assets to you; it is not secret.
Self-custody and hosted custody
With self-custody, the user normally controls the credentials. With hosted custody, a provider controls or helps manage the assets under its account terms. Neither is automatically right for every person, but they have different responsibilities and recovery processes.
- Self-custody places responsibility for key protection and recovery on the user.
- A hosted service may offer account-recovery processes but can impose its own checks, restrictions and custody terms.
- Understand which model applies before depositing or transferring assets.
Common wallet types
Wallets can be hardware devices, mobile apps, browser extensions, desktop software or interfaces connected to a custodian. Each changes convenience, exposure and the types of mistakes that are most likely.
Hardware wallet
A dedicated device that can keep signing credentials separate from a general-purpose device.
Mobile wallet
Useful for frequent access but dependent on device and app security.
Browser wallet
Convenient for web applications but requires particular care with phishing domains and approvals.
The non-negotiable safety rules
Do not share a seed phrase or private key with support, social-media contacts, websites or forms. Download wallet software only from verified sources. Confirm the address, network and transaction details before approval. Treat an unexpected request for a “verification” signature or recovery phrase as a warning sign.
- Make and protect an offline recovery plan before funding a new self-custody wallet.
- Use a strong device lock and keep wallet software updated.
- For unfamiliar routes or networks, a small test transfer can help identify a mistake before a larger transfer.
A practical next step
Read the wallet selection guide for a risk-based comparison and the crypto scam guide for common threat patterns.