Daniel Roberts (Iris Energy) on Sustainable Bitcoin Mining (EP.278)
On The Brink with Castle Island
Release Date: 01/20/2022
Mike Lempres on Silvergate’s Collapse, Bank Regulation, and Debanking (EP.593)
On The Brink with Castle Island
Former Chairman of Silvergate Bank Mike Lempres joins us for a discussion of Silvergate, the crypto-focused bank that was forced into liquidation in early 2023 following a bank run. This are the first on the record comments from any Silvergate executive following the voluntary liquidation announced in March 2023. In this episode: Mike’s background at the DoJ, at Coinbase, and how he came to be chairman of the board at Silvergate How Silvergate grew to become the premier crypto-focused bank with $14b in deposits Why the Silvergate Exchange Network (SEN) was so useful to the crypto space How...
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Weekly Roundup 01/31/25 (Senate Debanking Hearing, Powell's pivot, Tokenized Securities) (EP.592)
On The Brink with Castle Island
Matt and Nic are back with another week of news and deals. In this episode: Should we revisit Basel rules on Bitcoin? Jay Powell evolves on banks serving crypto Are banks going to offer crypto custody post SAB121? Gensler joins MIT Sloan Should crypto firms boycott MIT? The Senate will hold a hearing on debanking next week Choke Point 2.0 is getting caught up in conservative debanking Where are we on DeSci? Is tokenization finally going to happen? X is adding payments to the platform with Visa Truth Social is launching Truth.Fi...
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Weekly Roundup 01/24/25 (Trump EO, the Stockpile, Ross Free, SAB121 Gone!) (EP.591)
On The Brink with Castle Island
The episode where we logged on and won forever. Probably the biggest week in crypto history... In this episode: Ross Ulbricht is granted a full pardon Did Ross Ulbricht deserve a life sentence? SAB121 is finally gone Why SAB121 was bad Crypto ball review Trump launches a memecoin Trump is inaugurated OCP2.0 is over CBDCs are banned We review Trump's Executive Order No Strategic Bitcoin Reserve, but a stockpile instead Larry Fink calls for 600-700k BTC Mark Uyeda, the formation of a new task force: SEC Crypto 2.0 Senator Cynthia Lummis the formation of the...
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Weekly Roundup 01/17/25 (Lummis FDIC letter, the Tether tower, American made coins) (EP.590)
On The Brink with Castle Island
Matt and Nic are back for more news and deals. In this episode: Lummis instructs FDIC staff to not destroy evidence of Chokepoint Did the FDIC call Nic poor? Coinbase wins a partial victory against the SEC Canary Capital files for a Litecoin ETF Tether is moving to El Salvador and building an HQ there Atlanta Fed gets stablecoins The case for non-USD stablecoins Is there a case for other assets in a Strategic Reserve?
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Weekly Roundup 01/10/24 (FDIC Pause Letters released, SEC v Coinbase) (EP.589)
On The Brink with Castle Island
Matt and Nic are back after a week off. In this episode: Southern District of New York grants Coinbase’s appeal in their case against the SEC The Governor of the Czech national bank is considering Bitcoin in their reserves Do Kwon is extradited to the US E-trade is launching crypto trading The FDIC is forced by a court to further un-redact documents Coinbase asked for in a FOIA request We cover the FDIC’s Pause Letters Content mentioned in this episode: Fidelity Digital Assets, Bitwise, Nick Anthony,
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Dana Syracuse and Josh Boehm (Paul Hastings LLP) on the 2025 Digital Asset Legal Landscape (EP.588)
On The Brink with Castle Island
Dana Syracuse and Josh Boehm of Paul Hastings LLP join the show. In this episode we discuss: The common legal and regulatory considerations that are encountered by companies in the digital asset industry. Common pitfalls that entrepreneurs in this ecosystem should avoid. The state of the stablecoin industry and the regulatory considerations in this category. Potential changes ahead in 2025 on how digital assets are regulated in the United States. To learn more about Paul Hastings and their fintech and digital asset practices visit
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Weekly Roundup 12/27/24 (Tether x Rumble, quantum threat, End of year predictions) (EP.587)
On The Brink with Castle Island
Matt and Nic are back for an end of year episode. In this episode: Tether invests $775m in Rumble Who are the Rumble shareholders in Trump's admin? Microstrategy seeks approval for more Bitcoin buying We review the quantum risk to Bitcoin Matt and Nic's predictions for 2025 Sponsor notes: Coin Metrics, In Coin Metrics State of the Network Issue 291, we revisit major stories that shaped the digital asset industry in 2024 with a data-driven lens
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Janusz and Red (Bitcoin Layers) on Bitcoin Season 2 (EP.586)
On The Brink with Castle Island
and from join the show. In this episode: Innovation on Bitcoin, previously and now Technology vs consumer adoption The future of BTC use cases More about
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Weekly Roundup 12/20/24 (No SBR?, Prometheum, Crenshaw) (EP.585)
On The Brink with Castle Island
Matt and Nic are back with another week of news and deals. In this episode: Nic comes out against the SBR on Bloomberg More Prometheum nonsense MicroStrategy an additional 15,350 BTC for roughly $1.5 billion, bringing the company's total holdings to 439,000 BTC. Microstrategy was also to the Nasdaq 100 this week, which will lead to the stock's inclusion in several large ETFs including Invesco's QQQ. Anchorage Digital has New York BitLicense approval, enabling them to offer digital asset custody and trading services to more customers in the state such as RIAs and other...
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Alex Lin (Reforge) on On-chain Innovation & Consumer Use Cases (EP.584)
On The Brink with Castle Island
Wyatt sits down with . In this episode: Alex’s interdisciplinary road into crypto Innovation in blockchain infrastructure Crypto-powered consumer applications Learn more about a blockchain and frontier tech investment firm.
info_outlineIn this latest installment of the mining miniseries, Iris Energy cofounder and co-CEO Daniel Roberts joins us to talk through their approach to mining. In this episode:
- How Dan came to work in mining
- Backgrounds of the Iris executive team
- Which thinkers influenced Dan in his Bitcoin journey
- Why Iris focuses on sustainable energy and on only entering energy markets where they will not drive prices up for households
- How Iris chooses geographies to operate
- How Iris found abundant underutilized power in British Columbia
- Why Iris’ entry to British Columbia actually drives down energy prices for regular households
- Why Bitcoin mining has better location agnosticism than aluminum smelting or hydrogen production
- How Bitcoin miners are more flexible loads than other datacenters
- How Iris is geographically diversified in Canada, Texas, and Australia, and why geographic diversification is so important
- How flexibility from Bitcoin mining replaces peaker plants burning fossil fuels
- Why the oversupply of power is an issue for many power markets
- Are Western miners being sufficiently responsible in finding low carbon energy sources
- How Dan thinks about political risk at the state level
- Can the world accommodate Bitcoin’s power consumption growth if the price goes up tenfold?
- What plateauing efficiency gains for ASICs means for Iris
- Why Iris doesn’t see itself as a pseudo Bitcoin ETF and does not seek to hold Bitcoin on its balance sheet
Sponsor notes:
- Compass Mining is the world's first and largest online marketplace for bitcoin mining hardware, hosting, and ASIC reselling. Start mining your own bitcoin by visiting compassmining.io