Hot wallet: convenience over deep security

Convenience With Tradeoffs

A hot wallet is any wallet whose private keys live on an internet-connected device—your phone, browser extension, desktop app, or exchange account. The keys are usually encrypted at rest and protected by a password or biometric, but they are reachable, in principle, by any process running on the device.

Hot wallets exist because they make using crypto practical. Signing a DeFi transaction, swapping on a DEX, paying a friend, or minting an NFT all require a wallet that can sign instantly when prompted. A cold wallet is too slow for these flows. Popular hot wallets include MetaMask, Phantom, Rabby, and the wallets bundled into major centralized exchanges.

The security model assumes a hot wallet may eventually be compromised, so the right discipline is to keep only what you can afford to lose actively connected. Treat the hot wallet like the cash in your pocket: enough for the day, not your life savings. Move larger balances to cold storage, use a separate hot wallet just for risky activity like minting new tokens, and revoke unused dApp approvals regularly to limit the blast radius if something does go wrong.