Chapter 16

Staying Safe in Web3

Web3 safety is less about one perfect tool and more about habits. Most users are not defeated by broken cryptography. They lose funds because they approve the wrong transaction, trust the wrong site, or store keys carelessly.

A good mental model is layered defense. Each layer reduces a different class of risk, and weakness in one layer can cancel out strength in another.

Opsec covers your everyday choices: using bookmarks, ignoring urgent DMs, separating high-value activity from casual browsing, and protecting your seed phrase like a master key.

Wallet safety is about what you sign and what permissions you leave behind. Even a trusted wallet cannot save you if you approve a malicious contract or give unlimited allowances without checking.

Protocol and chain risk matter too. A polished interface does not guarantee safe smart contracts, and a convenient bridge may introduce more trust than users realize. Staying safe means evaluating the full path of your funds.