On The Brink with Castle Island

Publicly listed emails

info@castleisland.vc

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Weekly Roundup 10/16/26 (OCC debanking report, Google's quantum advance, Ledger spy chips, Richard Heart apprehended) (EP.745)

October 16, 2026

Matt and Nic are back with another week of news and deals. In this episode: The OCC publishes its debanking findings on America's largest banks Will the banks' fixes satisfy regulators? Google makes another advance in quantum error correction Coinbase lays out its requirements for Bitcoin's post-quantum migration Can Bitcoin's quantum transition accommodate institutional MPC wallets? OpenAI is reportedly in talks to buy Trail of Bits Patrick Witt leaves the White House — where d...

Weekly Roundup 10/09/26 (Going Bunker Mode, classical ECC breaks, AI's math discoveries) (EP.744)

October 09, 2026

Matt and Nic are back with more deals and news. In this episode:  Is it appropriate to have AI manage your fantasy league? Quant firms are hiring "quals" Justin Drake scares everyone in crypto Did AI destroy math? Why a classical ECDSA break would be worse than a quantum one Why we lean forward hash-based signatures for post-quantum Why rotating your address doesn't help now Is Bitcoin the "least of our concerns" if ECC breaks? Nic makes a new scientific discovery with Astra The NFL thinks t...

Esther Wong (Cashi) on Making Stablecoins Spendable (EP.743)

October 05, 2026

Esther Wong, founder and CEO of Cashi joins the show. Cashi is a stablecoin spending app and cashback card with a global footprint. In this episode we discuss: Customer personas and use cases for stablecoin payments The future of tokenized equities on chain The landscape of layer one and two blockchains and how these platforms converge with global stablecoin applications Cashi's roadmap and plans for the coming year To learn more about Cashi, visit their website and follow Esther Wong on X.

Empire · High booking difficulty · 1,000 - 10,000 listeners

Thinking Crypto News & Interviews · Medium booking difficulty · 1,000 - 10,000 listeners

The Defiant · Medium booking difficulty · 100 - 1,000 listeners

The Crypto Conversation · Medium booking difficulty · 1,000 - 10,000 listeners

Unchained · High booking difficulty · 10,000 - 100,000 listeners

How do I get in touch with On The Brink with Castle Island?

On The Brink with Castle Island is hosted by Matt Walsh and Nic Carter. Its publicly listed email is info@castleisland.vc. For guest bookings, the host or producer is usually the best person to reach. Podseeker helps you find direct host and producer contacts and pitch from your own inbox.

What is the email for On The Brink with Castle Island?

The publicly listed email for On The Brink with Castle Island: info@castleisland.vc.

How many listeners does On The Brink with Castle Island have?

Podseeker estimates On The Brink with Castle Island reaches 1,000 to 10,000 listeners per episode. Only the publisher has exact numbers.

Who is an ideal guest for On The Brink with Castle Island?

On The Brink with Castle Island typically books industry leaders. Typical guest background: Founders, senior executives, investors, and recognized technical or policy experts in cryptocurrency, blockchain infrastructure, decentralized finance, digital assets, or financial markets. Common among recent guests: Founded or led a notable crypto or blockchain company; Built or managed significant digital-asset products or infrastructure; Published influential research or analysis on cryptocurrency and financial markets. Recent guests include Guy Young.

How hard is it to get booked on On The Brink with Castle Island?

High. It mostly books established leaders in its field.

What topics does On The Brink with Castle Island cover?

Recent episodes cover Technology, Blockchain, Cryptocurrency, Decentralized Finance, and Stablecoins. Pitch an idea tied to one of these topics and mention a recent episode.