Safety Habits That Stick
A practical checklist for keeping funds safe.
You’ll cover
Lesson map
A layered defense
Security isn't one trick - it's habits that stack. Use a hardware wallet for meaningful balances. Keep a separate 'hot' wallet for experimenting with new dApps, so a bad approval can't touch your savings.
Bookmark the real sites you use and reach them only through those bookmarks, never through search ads or DM links.
Before you sign
Slow down at the signature prompt. Check the site's exact URL, read what permission is being requested, and confirm the amount. Revoke old token approvals you no longer need.
When in doubt, do nothing. Missing an opportunity is recoverable; a drained wallet usually is not.
Remember
Verify twice, sign once. Most losses happen in the last click before the funds leave.
Self-check
Check your understanding
Choose an answer for each question, then check the results and explanations.
Primary references
Documentation and standards
References added
Official technical references for further verification. A source link is not a guarantee that every earlier editorial sentence has been reverified; provider specifications may also change over time.
The curriculum predates this reference index. These sources are offered to check technical details; no original publication date has been inferred.
- ERC-20 token and allowance specificationEthereum Improvement ProposalsRead source ↗
Apply what you learned
Related practical guides
ERC-20 Approvals, Explained
Understand what a token allowance permits, why unlimited approvals increase exposure and what to check before approving or revoking one.
Read guide →Inspect Solana NFTs Safely
Use a public wallet address to inspect collectibles, then verify collection identity and provenance before trusting what an image or label claims.
Read guide →Revoke an ERC-20 Approval
A short process for finding a live allowance, confirming the spender and sending the revoke transaction from your own wallet.
Read guide →Unlimited vs. Exact Token Approvals
Compare the convenience of reusable allowances with the smaller exposure of approvals limited to a specific trade amount.
Read guide →Perpetual Liquidation Price
What moves liquidation closer or farther from entry and why leverage, margin mode and maintenance requirements all matter.
Read guide →
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