Partner @arrington_cap., Bostonian, Xennial, 🇺🇸. Former @Algorand, @avid, Sprint. Views are mine, not those of @arrington_cap
Joined January 2011
- Tweets 4,552
- Following 4,917
- Followers 23,100
- Likes 21,214
290 Photos and videos
Southie is a slice of heaven. if you know, you know. ☘️
Jun 12
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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Jun 12
Huge congrats @JasonYanowitz and @MikeIppolito_ - Well done!
Jun 12
1/ Blockworks has acquired Messari.
We’re bringing together crypto’s two largest data and market intelligence platforms.
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Jun 12
Looks like a steal for @Blockworks 👀
Jun 12
Crypto-Data Provider Blockworks Acquires Messari at a Discount
wsj.com/business/deals/crypt…
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Jun 12
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Jun 10
Barcelona, you win. Sagrada Família. Just incredible.
Watch the whole thing with the sound on
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Jun 10
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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Jun 10
Good background on @wyatt_benno and what @NovaNet_zkp is working on.
Jun 10
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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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…
Jun 10
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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Keli Callaghan 🛡️ retweeted
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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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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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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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
Jun 2
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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May 31
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 🫡
May 31
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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May 30
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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May 30
At least I didn’t get hit by a meteor today ✅
May 30
🚨 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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