A crypto hot wallet is an internet-connected wallet app you use for day-to-day crypto: holding smaller balances, sending and receiving, swapping, and connecting to dApps. It is convenient because it is always available on your phone or browser. It is also the reason phishing and approvals matter so much: hot wallets are built for frequent actions.
Hot wallets do not “store” your crypto. Your assets are on the blockchain. The wallet stores (or manages access to) the keys needed to control an on-chain address.
Your wallet app is not a box that “holds” your crypto. Think of the blockchain like a public scoreboard that shows who owns what. Your crypto “lives” on that scoreboard, not inside your phone.
What your wallet app holds is the thing that lets you control your spot on the scoreboard: your keys (or key access). Your wallet address is like your mailbox number. Your private key is like the key that opens that mailbox. Your seed phrase (those 12 or 24 words) is like a master backup key that can recreate your wallet on a new phone.
What is Self-custody?
Self-custody (also called non-custodial custody) means you control the keys. No company can reset your wallet, unlock your funds, or recover your seed phrase for you. That control is the point. It is also the trade-off: if you lose your recovery method, there is usually no “forgot password” button.
Some newer wallets soften this trade-off with social recovery (trusted people/devices can help you recover) or smart accounts (also called account abstraction), where your wallet is built as code on the blockchain. This can add recovery rules, spending limits, temporary access keys, or having someone else cover network fees.
These can make wallets easier to use, but you still need to understand who or what can approve recovery and what happens if that setup is lost or compromised.