Researcher. Written for @Forbes, @Cointelegraph, @CoinDesk andrey@sergeenkov.com

Joined May 2009
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Honored to win the ACJR award for Best Crypto Op-Ed for my piece on Ethereum security problems and the proposed recovery fund debate. Big thanks to @ACJRnetwork and everyone involved. Very good company to be in.
The ACJR awards are over, and we have our winners! ✨
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Andrey Sergeenkov retweeted
New: Kalshi and Polymarket have been sponsoring posts from users promoting viral LA election fraud conspiracy theories.
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FIVE HOURS LEFT 🕔 @polymarket traders are livid over a proposal to resolve "no" on "@Strategy sells any BTC by May 31" even though $MSTR did sell $BTC in May. Final decision expected by 8pm ET. @wowens covered the dispute in a new report to our clients & counterparties.
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Before I'd only seen @Polymarket change rules mid-market before and never after the event happened
I was just scammed for $500K by Polymarket. I am "willo2", the top holder of YES on "MicroStrategy sells Bitcoin by May 31st". Here's what happened:
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May 21
🏆 Best Crypto Op-Ed @Nikopolos, "Will TheDAO's $220M Security Fund Actually Make Ethereum Safer?" Pointed, principled commentary on governance and security: sergeenkov.com/will-thedao-m…

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The News/Media Alliance of 2,200 US and Canadian publishers sent a demand letter to the Common Crawl Foundation asking that their content be removed on request, AI use explicitly banned in the terms of use, and an enforceable warning added to the opt-out registry. Over 60% of Common Crawl's 2024 donations came from generative AI companies or data brokers. It also crawls some crypto news websites. By my rough estimate, around 60k @Cointelegraph articles can be recovered via Common Crawl. editorandpublisher.com/stori…
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My op-ed was shortlisted for the @ACJR journalism & research awards. Good company to be in.
We have our finalists for the ACJR Crypto and Journalism Awards (brought to you by @Bitdeer) Congratulations to all finalists & entrants 🤠
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Please help me report the crypto scammers that hijacked this account: @defemisback

ALT Karen Being A Karen GIF

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Presidential pardons, dozens of terrabytes of Epstein files, DOJ scoops, and just good ole’ fashioned digging into the most hyped technology on the most hyped blockchains. The submissions for our “Best Crypto News Story” category were phenomenal! From @sander_lutz, @JeSuisNaga, @Nikopolos, @dlnews, @whosknave, @beincrypto, Callan Quinn, @vronirwin. Good luck! See you in Miami May 7 — luma.com/acjr2026
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I'm proposing that @Polymarket should airdrop only to those who lost money, proportional to their losses. 84% of Polymarket traders lost money funding the world's largest prediction market. These people deserve to be rewarded. If you're one of them, this proposal is for you. sergeenkov.com/loss-based-po…
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A recent study found that the top 1% of @Polymarket users capture 84% of all trading profits, mostly at the expense of casual traders. The authors concluded that “the informational benefits of prediction markets come at a cost to unsophisticated participants." papers.ssrn.com/sol3/papers.…
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Did @Polymarket end up hiring that team? I can't find any public updates on it. @justinaknope @iboudway
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Polymarket Recruiting for In-House Team That Trades With Customers bloomberg.com/news/articles/…
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According to a @keyrock report, 88% of airdropped tokens lose value within three months as farmers exit their positions. The biggest mistake @Polymarket could make is launching an airdrop based on any metric that's being farmed right now. keyrock.com/airdrops-in-the-…
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Nearly 25% of @Polymarket's trading volume is wash trading according to Columbia Business School research, with 14% of all wallets flagged and peak weeks hitting 60% fake volume. The motive is airdrop farming.
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Any chance someone's already found the BTC or USDT addresses Iran's using for Hormuz tolls?
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I found that 84% of Polymarket traders lose money, and only 2% have made more than $1,000 in total profit. What are the odds if someone quit a job for @Polymarket? Full results with raw data in my article. sergeenkov.com/polymarket-pr…
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