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Selin Aydin

Security Editor

Selin Aydin

Covers crypto security, custody, exploits and smart-contract risk.

15 stories23 guidesRatings: Custody & wallets

Selin Aydin runs OBOL's security desk, covering everything from the first drained wallet through to the post-mortem nobody wants to publish. She previously worked in smart-contract auditing, reviewing code for bugs before they became headlines, and now applies the same forensic patience to reconstructing incidents after the fact: where the exploit entered, what the audit missed, and who is quietly exposed next.

Security, custody and the failures that repeat

Her coverage tracks bridge failures, private-key compromises, oracle manipulation and the recurring pattern of protocols shipping unaudited upgrades under deadline pressure. She is equally interested in the unglamorous end of the problem, where most people actually lose money: a signature approved without reading it, a recovery phrase stored badly, a support agent who was never support.

She is blunt about the industry's habit of calling every incident sophisticated when the root cause is a known vulnerability class, and names the pattern rather than softening it for relationships.

At OBOL, Selin writes the custody and security guides, contributes the hardware wallet and self-custody ratings, and publishes incident breakdowns as facts become verifiable — resisting speculation while an exploit is still live and updating figures publicly when they change.

Latest stories

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  1. Bitcoin Slips to $74,762 as Treasury Cuts MEXC Off From U.S. BanksBitcoin fell to $74,762, its weakest level since August 21, after a hot jobs report, while FinCEN moved to cut MEXC off from U.S. banks over $16.7 billion in alleged illicit flows.7 Nov 2026Markets
  2. Binance Hack Shakes Bitcoin Below $77K as US Spot ETFs Still Draw InflowsBinance disclosed a security incident involving about $6.3 billion in assets, pushing Bitcoin below $77,000 and wiping out roughly $1.5 billion in leveraged bets. Yet US spot Bitcoin ETFs extended their inflow streak to three sessions.30 Oct 2026Regulation
  3. Bitcoin Holds Near $81K as Fed Decision Looms and Google Unveils Crypto Custody SecurityBitcoin is trading around $81,000 as US spot ETFs draw $286 million in two days and markets wait for the Federal Reserve’s rate decision. Meanwhile, Google is previewing a new custody security system for banks handling digital assets.28 Oct 2026Regulation
  4. Bitcoin ETFs Bleed $65.4M as Hawkish Fed Talk Puts CPI in FocusU.S. spot Bitcoin ETFs logged a $65.4 million outflow on October 12, all from BlackRock’s IBIT, while a hawkish Fed message set the stage for Wednesday’s September CPI report.13 Oct 2026Regulation
  5. Bitcoin ETFs Bleed $244 Million as $1.19 Billion Liquidation Wave Shakes the MarketUS spot Bitcoin ETFs recorded $244 million in outflows while roughly $1.19 billion in leveraged positions were liquidated. Here is what drove the move and what traders are watching next.9 Oct 2026Markets
  6. Fed Rate Hike and Bitcoin Reserve Bill Reshape US Crypto LandscapeThe Federal Reserve's first rate hike in three years rattled Bitcoin before a modest rebound, while a U.S. House committee advanced legislation to lock the federal Strategic Bitcoin Reserve into law.17 Sept 2026Markets
  7. Bitcoin Rallies Toward $80K as Senate Faces Make-or-Break CLARITY Act VoteCrypto markets climbed 3% on Monday as Bitcoin neared $80,000 and Ethereum broke $2,500 — just as the US Senate prepares for a critical cloture vote on the CLARITY Act that could decide the fate of American crypto regulation in 2026.15 Sept 2026Markets
  8. Bitcoin, Ethereum Slip as Block Applies for U.S. Trust Bank CharterBitcoin and Ethereum opened lower on September 9 amid U.S.–Iran tensions and rising oil prices, while Block filed for a federal trust bank charter to expand its Bitcoin and stablecoin custody business.9 Sept 2026Markets
  1. Address Poisoning and the Copy-Paste AttackNothing is signed and nothing is approved. You simply copy an address from your own history, and it is not the one you think.Beginner6 min
  2. Restaking Slashing: What Can Actually Take Your PrincipalOrdinary staking risks a penalty defined by one protocol. Restaking risks penalties defined by every service your operator opted into.Advanced10 min
  3. Phishing That Targets Hardware Wallet OwnersData breaches at wallet vendors put real names and addresses in circulation. The phishing that followed is unusually well-informed.Beginner7 min
  4. Air-Gapped Signing: What QR Wallets Actually Protect AgainstNo USB, no Bluetooth, no network. The device signs and shows you a QR code, and the only thing crossing the gap is data you can inspect.Intermediate8 min
  5. Recovering From a Compromised Wallet: The First HourThe order of operations decides how much you keep. Most people revoke first, which is the step that loses them the rest.Beginner8 min
  6. Seed Phrase Backup Beyond Paper: Steel, Shamir and MultisigMore crypto has been lost to bad backups than to attackers. The backup, not the wallet, is where self-custody usually fails.Intermediate9 min
  7. Attestation vs Audit: What Stablecoin Reports Really SayEvery major stablecoin publishes reserve reports. Almost none of them are audits, and the difference decides what the document is worth.Intermediate8 min
  8. Wallet Drainers: How the Signature That Empties You WorksNothing is hacked. You approve a transaction whose real meaning is hidden behind a wallet prompt that says almost nothing.Beginner9 min