Partner @arrington_cap., Bostonian, Xennial, 🇺🇸. Former @Algorand, @avid, Sprint. Views are mine, not those of @arrington_cap

Joined January 2011
290 Photos and videos
Southie is a slice of heaven. if you know, you know. ☘️
EXCLUSIVE: The kids whose lemonade stand was robbed at gunpoint in Boston opened another stand today Check out this crowd who came to support them!! 🇺🇸🇺🇸🇺🇸
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Huge congrats @JasonYanowitz and @MikeIppolito_ - Well done!
1/ Blockworks has acquired Messari. We’re bringing together crypto’s two largest data and market intelligence platforms.
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Looks like a steal for @Blockworks 👀
Crypto-Data Provider Blockworks Acquires Messari at a Discount wsj.com/business/deals/crypt…
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Keli Callaghan 🛡️ retweeted

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Keli Callaghan 🛡️ retweeted
Barcelona, you win. Sagrada Família. Just incredible. Watch the whole thing with the sound on
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Tokenization isn’t just pasting assets onchain. It’s making them faster, more useful, and built for the way capital moves now. @hiltnerjim explains at REDeFiNE TOMORROW 2026 by @SCB10X_OFFICIAL.
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Good background on @wyatt_benno and what @NovaNet_zkp is working on.
The "how I got into ZK" story sounds pretty crazy 🎧 With generous @SuccinctJT saying yes to a deep dive Asia-time session in the @__zkhack__ Discord on his book. @srinathtv participating in folding scheme meetings (we still run today), the @PrivacyEthereum Lurk Labs folks who production-hardened my Supernova implementation, and a grant where @JensGroth16 came on a call.. @benediktbuenz telling me "it's all just polynomial evaluations" 😅, and many other awesome people I met along the way. Hear the journey and where we are going on @zkpodcast 403: zeroknowledge.fm/podcast/403…
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Keli Callaghan 🛡️ retweeted
Jun 10
As AI agents begin transacting on behalf of businesses, payments need more than speed. They need trust, controls, and clear rules for how value moves. We're helping build the infrastructure for trusted agent-driven payments, with the XRP Ledger and $RLUSD helping lay the foundation for the future of commerce. We're pleased to be part of the ecosystem supporting @Mastercard's Agent Pay for Machines initiative, helping validate new use cases, establish common rules, and accelerate adoption. → mastercard.com/us/en/news-an…
As AI agents begin to act, payments move into the background — at machine speed and massive scale. Today we’re introducing Mastercard Agent Pay for Machines — bringing structure, governance, and trust to this new class of payments. Launching with 30 partners to bring this to life from day one. This isn’t just more payments. It’s a new operating model for commerce. 👉 Learn more: mastercard.com/us/en/news-an…
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I've spent years building toward this moment. The Clarity Act is the most consequential financial legislation of this generation and we are going to get it done.
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Jun 5
High-agency is contagious. You spend time around someone who just does things and suddenly your own list of "impossible" tasks starts looking suspiciously possible.
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Solid fun and inspiration at @msdavidova and @Nick_Davidov’s AI rabbit hole event today in SF! Enjoyed my fireside with @gonka_ai founders @DaLiberman and adding a little decentralized spice to the AI convos 🐰🎩🫖
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Keli Callaghan 🛡️ retweeted
LATEST: More than half of all $BTC in circulation is now held at an unrealized loss, a signal that has coincided with every major bear market bottom in history.
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Thank you to the @proofoftalk team for a wonderful few days of connecting with old friends and new! Proof of Pitch, side events, small meetups, round tables, panels alongside some of the best and curated introductions - honored to be a part of it for so many years in a row now! 🙌
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Keli Callaghan 🛡️ retweeted
Geopolitics. Macro. Digital assets. At InnovateMiami, @arrington (@Arrington_Cap) and @ethereumJoseph (@consensys) sat down for a wide-ranging conversation on the forces shaping global markets and the future of crypto. No scripts. No filters. Just signal. Watch the full InnovateMiami discussion now.
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Ngl, I mainly come to start my morning with violin music as I rush in late to my first meeting
The doors are open. Welcome to the Louvre Palace. A violinist plays at the entrance, and the 2,500 decision-makers start walking in from across the world. This is the morning we have been working toward all year. Your year changes here.
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Nice seeing @Titannet_dao as a finalist in the @proofoftalk Proof of Pitch today (with @MarketAcross flavored MC)! And @CoinDesk doing a nice write up on their momentum 🙌 coindesk.com/tech/2026/06/02…
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Woot! First off - these projects are awesome and I’m excited to hear from them all during the @proofoftalk @CantonNetwork track. Second - what a crew of judges! Honored to join these gentlemen 🫡
1/ Proof of Pitch 2026. @CantonNetwork Ecosystem Track. @proofoftalk Location: the Louvre, Paris. Dates: June 3, Day 2 of Proof of Talk. Format: 5 minute pitch, 5 minute Q&A. 6 finalists, building Canton-native infrastructure on the same network the largest names in regulated finance already run. The world class jury lineup: -Leeor Groen, Partner, @TheSpartanGroup. @leeorgroen -Keli Callaghan, Partner, @Arrington_Cap. @KeliCallaghan -Danish Chaudhry, General Partner, @Papervc. @djchaudhry_ -Yiannis Varelas, Founder, @FiveNorthHQ. @bc1pxxx The 6 finalists of the Canton Ecosystem Track below.
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Keli Callaghan 🛡️ retweeted
Harvard professor Arthur Brooks explains how data shows that the unhappiest and most mentally ill people are mostly on the political left while the happiest are on the right. Liberal women 18-30 have a 60% chance of being diagnosed mentally ill. Discuss.

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At least I didn’t get hit by a meteor today ✅
🚨 WOW! Another video of the “explosion” in the Boston area really captures how LOUD the boom was It’s looking like the cause was a “significant” meteor crashing through the atmosphere and burning up, as indicated by heat signatures via satellite, per @NStewWX This has not yet been confirmed.
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