What Is Cold Storage?
Cold storage means holding crypto private keys on devices that have never been connected to the internet. Hardware wallets (Ledger, Trezor) are the most common implementation: the keys are generated and stored on the device, signing happens offline, only the signed transaction touches the internet.
The security advantage is enormous: a typical exchange or hot wallet hack is irrelevant to cold-storage holdings because the keys were never online. Even if the host computer is fully compromised by malware, the hardware wallet itself remains secure.
Tradeoffs: cold storage is inconvenient for frequent trading. Most active traders keep a small amount in a hot wallet for trading and the bulk in cold storage. The standard advice — 'not your keys, not your coins' — particularly applies after the 2022 FTX collapse, which made cold storage advocacy mainstream.
Related terms
- CEX (Centralized Exchange) — Cryptocurrency exchange operated by a central company that custodies user funds.
- Smart Contract — Self-executing program on a blockchain that runs when predetermined conditions are met.
- DEX (Decentralized Exchange) — Cryptocurrency exchange that runs on smart contracts without a central operator.