Even with a hardware wallet, you still have a single point of failure: the 24-word seed phrase. If a fire destroys it, or a thief finds it, your funds are compromised. A Multi-Sig wallet changes the paradigm.
How 2-of-3 Multi-Sig Works
A 2-of-3 setup means you create 3 separate cryptographic keys, but only need 2 of them to sign a transaction and move funds.
Key 1: Your primary hardware wallet (kept at home).
Key 2: A secondary hardware wallet (kept in a bank safety deposit box or another secure location).
Key 3: A seed phrase backup or a cloud-based recovery service (kept geographically remote).
If a burglar steals Key 1, they cannot move funds because they need a second key. If your house burns down and destroys Key 1, you can still recover your funds using Key 2 and Key 3.
Best Platforms for Multi-Sig
Unchained Capital and Casa remain the industry leaders for collaborative Bitcoin multi-sig. For Ethereum and EVM chains, Safe (formerly Gnosis Safe) is the absolute standard used by DAOs and institutions.
For XRP, the XRP Ledger natively supports multi-signing at the protocol level, which can be configured via advanced wallets like Xaman.