On The Brink with Castle Island
Castle Island Ventures
Show overview
On The Brink with Castle Island has been publishing since 2019, and across the 7 years since has built a catalogue of 735 episodes. That works out to roughly 520 hours of audio in total. Releases follow a several-times-a-week cadence.
Episodes typically run thirty-five to sixty minutes — most land between 34 min and 48 min — and the run-time is fairly consistent across the catalogue. It is catalogued as a EN-language Business show.
The show is actively publishing — the most recent episode landed 4 days ago, with 34 episodes already out so far this year. The busiest year was 2020, with 134 episodes published. Published by Castle Island Ventures.
From the publisher
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
View all 735 episodesWeekly Roundup 06/26/26 (Quantum EOs, STRC's selloff, more MSTR) (EP.727)
Weekly Roundup 06/19/26 (STRC under pressure, Illinois' crypto tax, Open weight AI vs the AI boom) (EP.726)
Weekly Roundup 06/12/26 (Strategy survives, Zcash Orchard bug, the thin model hypothesis) (EP.725)
Omid Malekan (Columbia Business School) on Private Money, Financial Systems, and Crypto in Geopolitics (EP.724)
Weekly Roundup 06/05/26 (MSTR wobbles, Polymarket's MSTR market, Andrew Left convicted) (EP.723)
Weekly Roundup 05/29/26 (Was debanking real, SoFiUSD, WSJ gets free banks wrong, trouble in ETHland) (EP.722)
Weekly Roundup 05/22/26 (AI and power bills, SpaceX IPO, Prime Trust clawbacks, USG invests in quantum) (EP.721)
Weekly Roundup feat. Gus Coldebella 05/15/26 (Clarity advances, Circle's Arc token) (EP.720)
Weekly Roundup 05/08/26 (Consensus Miami, AI layoffs strike Coinbase, Clarity compromise, AI energy and water use) (EP.719)
Weekly Roundup 05/30/26 (DeFi's worst ever month, PTJ on Bitcoin, quantum canaries) (EP.718)
Pluto (Harbor) on the fate of DeFi after KelpDAO (EP.717)
Weekly Roundup 04/24/26 (Finding Satoshi, KelpDAO retrospective, Insider weather betting, Coinbase's Quantum report) (EP.716)
Brandon Arvanaghi (Meow) on Banking AI Agents (EP.715)
Weekly Roundup 04/17/26 (BIP361 proposal, SEC's DeFi frontend policy, CSW's Bitcoin movie) (EP.714)
Weekly Roundup 04/10/26 (New Satoshi candidates, Mythos' 0-days, CZ's memoir) (EP.713)
Connor Dougherty (Valinor) on the Evolution of Private Credit (EP.712)
Ep 711Weekly Roundup 04/03/26 (Two big quantum papers, Drift protocol hack, Maritime Salvage law) (EP.711)
Matt and Nic are back for another week of news and deals. In this episode: The significance of the new Google and Oratomic papers on quantum computing and ECC256 Why short range attacks are now part of the threat model Is Nic conflicted out from discussing quantum? What will be the fate of the Satoshi coins? What maritime law and shipwreck recovery tells us about the fate of Satoshi's coins Drift protocol is hacked Gary Gensler does not like prediction markets DATs are selling BTC Content mentioned in this episode: Cain et al, Shor's algorithm is possible with as few as 10,000 reconfigurable atomic qubits Babbush et al, Securing Elliptic Curve Cryptocurrencies against Quantum Vulnerabilities: Resource Estimates and Mitigations
Ep 710Weekly Roundup 03/27/26 (Google's Quantum Deadline, Circle's selloff, DATs are selling) (EP.710)
Matt and Nic are back for another week of news and deals. In this episode: Circle stock sells off big on a CLARITY yield update compromise Tether is doing their first big 4 financial audit Who is the CLARITY Act Yield "compromise" good for? Why Circle might benefit from closing the yield loophole Is no bill better than a bad bill? Should Coinbase back the bill? Fannie Mae will accept crypto-backed mortgages Ethereum Foundation launches their post-quantum roadmap Google has revised their quantum transition deadline up to 2029 Why we will not have a lot of warning regarding quantum risk Where is Bitcoin on quantum preparedness? Why it's not all doom and gloom on quantum MARA sells $1b worth of BTC
Ep 709Weekly Roundup 03/20/26 (Vanity Fair fiasco, SEC token taxonomy, tokenized deposits) (EP.709)
Matt and Nic are back for another week of news and deals. In this episode: What happened with the disastrous Vanity Fair photoshoot Kraken postpones their IPO The SEC releases long-awaited guidance distinguishing securities from commodities A compromise may be developing over stablecoin yield The SEC drops their case against Nader Al-Naji Phantom gets a no-action letter from the CFTC Tempo mainnet launches Some regional banks are tokenizing deposits Will agentic payments be a thing Q-day is creeping closer Content mentioned: Galaxy Research, Bitcoin Is Rising to the Challenge of Quantum Readiness Global Risk Institute, Quantum Threat Timeline Report 2025
Ep 708Weekly Roundup 03/13/26 (SEC vs CFTC detente, prediction market surveillance, equitizing tokens) (EP.708)
Matt and Nic are back for another week of news and deals. In this episode: Are we in an oil crisis and energy shock Binance is suing the WSJ for defamation NASDAQ and Kraken partner to bring stocks on chain The SEC and CFTC issue an MOU Prediction markets need surveillance Across is considering converting their token into equity The White House's cyber strategy The banks are still fighting about stablecoin yield What risks do stablecoins actually pose to banks?