Plain English
A multisig (multi-signature) wallet requires more than one approval before any transaction can be sent. Common setups are 2-of-3 (any two of three keys can sign) or 3-of-5. It removes single points of failure for storage and for theft.
How it actually works
On-chain, a multisig is a smart contract or specialized address that only releases funds when M of N valid signatures are presented within a single transaction. The signers can be distributed across devices, locations, family members, lawyers, or a corporate board. Popular implementations include Safe (formerly Gnosis Safe) on EVM chains and native multisig on Bitcoin.
What it means for you
For balances above the loss threshold you can stomach in a single-key wallet, multisig is the upgrade. It is the standard for family offices, DAO treasuries, and serious individual holders. A 2-of-3 with one key on a hardware wallet, one with your attorney, and one in a bank vault gives you both theft resistance and inheritance planning in one structure.
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Educational content only. Not investment, tax, or legal advice.