Crypto Wallets

Understand crypto wallets, seed phrases, passkeys, and the difference between hot, cold, and smart wallets. Stay safe and in control of your digital assets.

Best DeFi Wallets in 2025: Security, UX, and Power-User Features Compared

Crypto Wallets /

Best DeFi Wallets in 2025: The No-Nonsense Guide to Security, UX, and Real Utility Choosing a DeFi wallet in 2025 is about more than swaps. It’s security models (EOA vs smart accounts), human-readable signing, AA/4337 paymasters, built-in simulations, multisig modules, and sane defaults you won’t regret at 3 a.m. This guide breaks down the best […]

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Smart Wallets With Passkeys: A Practical ERC-4337 Setup Guide (Security, Fees, Recovery).

Crypto Wallets /

Smart Wallets With Passkeys: A Practical ERC-4337 Setup Guide (Security, Fees, Recovery) Passwords are brittle, seed phrases are terrifying for mainstream users, and “gas first, app later” killed more on-ramps than we admit. Passkeys (WebAuthn/FIDO2) and ERC-4337 smart accounts finally fix this. In this guide you’ll set up a passkey-first smart wallet, understand fees and

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Smart Wallets and Passkeys: The Guide to Account Abstraction (ERC-4337)

Advanced blockchain, Crypto Wallets, Smart Contracts /

Smart Wallets & Passkeys: The 2025 Guide to Account Abstraction (ERC-4337) Passwords are dying, seed phrases have scared mainstream users for a decade, and wallet UX is finally catching up. In 2025, passkeys (WebAuthn/FIDO2) are going default on major platforms, while account abstraction (ERC-4337 smart accounts) turns wallets into programmable apps that can do gas

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How to Keep Your Seed Phrase Safe: A Complete Guide

Blockchain Basics, Crypto Wallets, Security & Best Practices /

How to Keep Your Seed Phrase Safe: A Complete Guide Your seed phrase (recovery phrase) is the master key to your crypto. Anyone who gets it can move your funds; if you lose it, nobody, not an exchange, not wallet support, not the blockchain can restore it. This guide gives you a practical, battle-tested process

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Using Hardware Wallets (Setup, Passphrase, Best Practices)

Crypto Wallets, Security & Best Practices /

Using Hardware Wallets: Setup, Passphrase & Best Practices Lock down your keys the right way, from first unbox to recovery rehearsal. TL;DR: Buy from official channels, initialize on-device, record the seed offline, consider a passphrase, verify addresses on-screen, and test a recovery before storing real value. In this lesson Unbox & supply-chain safety On-device setup

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Contract Risks (for Users): Re-entrancy, Upgrades, Admin Keys

Security & Best Practices, Crypto Wallets /

Contract Risks (for Users): Re-entrancy, Upgrades, Admin Keys How to evaluate a DeFi/NFT protocol before you trust it with funds. TL;DR: Check audits, bug bounties, upgradeability, admin roles, and oracle design. Prefer protocols with timelocks, multisig governance, and public risk docs. In this lesson Re-entrancy (what to watch as a user) Upgradeable contracts & proxies

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Common Attacks: Phishing, Drainers, Fake Airdrops

Security & Best Practices, Crypto Wallets /

Common Attacks in Web3: Phishing, Drainers, Fake Airdrops How the most successful crypto scams actually work, and exactly how to avoid them. TL;DR: Most losses start with social engineering (DMs, emails, pop-ups). Drainers abuse token approvals or get you to sign malicious messages. Never enter a seed phrase outside your hardware wallet. Use an approval

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Smart Contract Risks Re entrancy, oracle-manipulation

Smart Contracts, Blockchain Basics, Crypto Wallets, Security & Best Practices /

Smart Contract Risks: Re-entrancy, Oracles, Access Control & More Recognize top vulnerability classes and the standard defenses used in production. TL;DR: Most exploits are preventable. Use CEI, ReentrancyGuard, strict access control, safe math by default (>=0.8), and robust oracle design. Test, fuzz, and audit before mainnet. In this lesson Re-entrancy Oracle Manipulation Access Control Math/Overflow

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