
On The Brink with Castle Island
Hosts Matt Walsh and Nic Carter of Castle Island Ventures explore news and deals in the public blockchain space and talk to some of the leading experts in the industry. Learn more and stay up to date at CastleIsland.vc and follow on twitter @CastleIslandVC
Latest episodes

10 snips
Jun 26, 2025 • 39min
Josh Frank (The Tie) on Crypto Market Intelligence (EP.638)
Josh Frank, the founder and CEO of The Tie, a market intelligence platform for digital assets, shares insights on the evolving crypto landscape. He discusses The Tie's origin and the critical role of sentiment data, emphasizing its impact on trading and investment strategies. Josh explores the challenges of identifying authentic projects within a scam-filled market and highlights the Canton Network's contributions to privacy in transactions. He also touches on innovative strategies for profitability that leverage data insights to enhance shareholder value.

9 snips
Jun 23, 2025 • 43min
Luca Prosperi (M0) on a Universal Stablecoin Platform (EP.637)
Luca Prosperi, CEO and Co-Founder of M0, dives into the innovative world of decentralized finance and stablecoins. He shares invaluable lessons learned from MakerDAO and explores the dual banking system's influence on M0's creation. Prosperi discusses the evolution of stablecoins, emphasizing interoperability and liquidity as game-changers. He also addresses challenges in launching a stablecoin, the role of open-source platforms, and how M0 plans to revolutionize financial services with customizable and decentralized assets.

9 snips
Jun 20, 2025 • 38min
Weekly Roundup 06/20/25 (GENIUS passes, Nobitex Hack, FUD dice retrospective) (EP.636)
The GENIUS Act gains traction with bipartisan support, facing potential amendments in the House. Predictions claim stablecoins could balloon to $3.7 trillion by 2030, raising concerns about their influence on the U.S. Treasury. A major hack impacts an Iranian crypto exchange, leading to significant losses. The rise of deposit tokens is discussed alongside partnerships like Yellowcard and Visa in Africa. Lastly, nostalgic reflections on past Bitcoin FUDs shed light on the evolving crypto landscape.

Jun 19, 2025 • 16min
Santi Alvarado (XFX) on Improving FX for Stablecoins (EP.635)
Santi Alvarado, CEO and Co-Founder of XFX, shares his journey from civil engineering to fintech innovator, driven by a passion for improving payment processes. He delves into the complexities of the legacy FX market and discusses how XFX enhances liquidity for cross-border payments. Alvarado emphasizes the potential of stablecoins to revolutionize money transfers, offering real-time settlements and reducing inefficiencies. He also highlights key features of XFX's platform designed for institutional clients, focusing on transparency and speed in transactions.

Jun 18, 2025 • 23min
Greg Genega (KPMG) on Crypto Auditing (EP.634)
Greg Genega, Digital Asset and Blockchain leader at KPMG, shares his expertise in crypto auditing. He discusses how KPMG collaborates with crypto firms and the innovations transforming the space. Greg delves into the complexities of crypto operations, tax compliance, and the necessity for specialized audits in a rapidly evolving landscape. He also contrasts public and permissioned blockchains, emphasizing their impact on financial transactions. This engaging dialogue provides invaluable insights for new founders navigating the cryptocurrency world.

5 snips
Jun 13, 2025 • 35min
Weekly Roundup 06/13/25 (Stripe buys Privy, Stablecoin FUD, Rogue Traders) (EP.633)
This week features Stripe's intriguing acquisition of Privy, highlighting its wallet infrastructure. The hosts dive into stablecoin discussions, debunking FUD and exploring usability in unstable economies. IPO excitement brews as firms like Bullish and Gemini file paperwork. The troubling world of rogue traders is unveiled, with infamous cases like Barings Bank taking the spotlight. Additionally, GameStop's cryptocurrency strategy falls flat, while Soc Gen prepares to launch its own USD stablecoin.

Jun 6, 2025 • 28min
Weekly Roundup 06/06/25 (Circle IPO, Singapore rules, Trump wallet?) (EP.632)
This week, the hosts dive into Circle's explosive IPO and its implications for the crypto industry. They analyze the future of stablecoins and the innovative strategies shaping payment networks. Controversy brews around Magic Eden's partnership tied to a Trump wallet, while MoonPay secures a coveted Bit license. The discussion also highlights K-pop's entry into the crypto space with a unique Bitcoin treasury strategy. Finally, they touch on Singapore's regulatory shifts and the global impact of South Korean culture on cryptocurrency.

13 snips
Jun 4, 2025 • 34min
Isha Varshney (Celo) on Stablecoin Adoption Across Markets (EP.631)
Isha Varshney, Head of Ecosystem at Celo Foundation, dives into the world of stablecoins, particularly their impact in emerging markets like sub-Saharan Africa. She discusses the revolutionary effect of M-Pesa on financial inclusion in Kenya and its potential to reshape lending. The conversation also explores the rise of USDT for cross-border transactions and the innovative Minipay platform. With a focus on blockchain's empowering role in local economies, Varshney envisions a future where stablecoins enhance accessibility and efficiency in financial services.

5 snips
May 30, 2025 • 22min
Weekly Roundup 05/30/25 (Bitcoin Access Vehicles, GME buys BTC, Pangea Fund) (EP.630)
This week, the hosts delve into potential warning signs for Bitcoin access vehicles and whether Bitcoin has lost its battle as a medium of exchange. They discuss GameStop’s foray into Bitcoin investments and the subsequent market reactions. Additionally, regulatory shifts, including the Department of Labor's reversal on anti-crypto guidance, are examined. The episode also highlights innovative investment vehicles like Cantor Fitzgerald’s Bitcoin/gold fund and tackles disturbing revelations from the crypto hedge fund sector.

May 29, 2025 • 26min
Anthony Yim (Artemis) on Stablecoin Payments from the Ground Up (EP.629)
Join Anthony Yim, cofounder of Artemis, as he dives into his company's groundbreaking report on stablecoin payments. He discusses the meticulous process behind their volume estimates and why transparency is crucial in an industry plagued by misinformation. Anthony highlights the explosive growth of B2B transactions versus traditional methods and the challenges of tracking genuine usage. Additionally, he shares insights on how stablecoins can revolutionize borderless finance and improve accessibility for underserved populations.