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    • How-to guides

    Crypto Wallets & Seed Phrases, Explained

    Short answer: a wallet is an app or device that holds the keys to your crypto, not the crypto itself (that lives on the blockchain). The seed phrase - 12 or 24 words - is your money. Anyone who has it has the funds. Never share it, never type it into a website. General information, not financial advice.

    “Wallet” is a slightly misleading word. Your coins never leave the blockchain; the wallet just stores the cryptographic keys that prove the coins are yours and let you spend them. Understand that and the rest is straightforward.

    Hot vs cold

  • Hot wallet - software on your phone or browser, connected to the internet. Convenient for spending and paying for orders. Examples: mobile/extension wallets.
  • Cold wallet - a dedicated offline device that signs transactions without exposing keys to the internet. Best for holding larger amounts long-term.

    • A common setup: a hot wallet with a small spending balance for payments, a cold wallet for savings.

    Custodial vs self-custody

  • Custodial - an exchange or app holds the keys for you. Easy, recoverable via support, but you’re trusting a third party.
  • Self-custody - you hold the seed phrase. Full control, full responsibility, no “forgot password.” This is the “not your keys, not your coins” idea.

    • The one rule: your seed phrase restores the entire wallet. No legitimate person, support agent, app, or website will ever ask for it. Write it on paper, store it offline in more than one place, and never photograph it or paste it into anything. If a site asks for your seed phrase, it is a scam - leave.

    Setting up your first wallet

  • Install a reputable wallet from its official site or app store (check the URL carefully).
  • Create a new wallet; write the seed phrase on paper as it’s shown.
  • Confirm the phrase, set a device PIN/biometric lock.
  • Receive a tiny test amount first; verify the address and network before any larger transfer.

    • Then you’re ready to pay - see How to pay with crypto. Picking a coin/network? See Solana and stablecoins.

    Frequently Asked Questions

    What is a seed phrase? 12–24 words that restore your wallet and all funds. Whoever has it controls the money. Keep it offline; never share it.

    Hot vs cold wallet? Hot = online software (spending). Cold = offline device (savings).

    Custodial vs self-custody? Custodial = a company holds your keys. Self-custody = you hold the seed phrase and full responsibility.

    Related Reading

  • How to pay with crypto
  • Stablecoins explained
  • What is Bitcoin?
  • Back to the Crypto Blog

    • Primary sources & further reading

  • Bitcoin - bitcoin.org: secure your wallet
  • Ethereum - ethereum.org: wallets

    • External links are for reference only; New-U is not affiliated with these projects and links carry no endorsement or financial advice.

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