21 in 21

Hosted by Haley Berkoe

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TECHNOLOGY
UPDATED BIWEEKLY

Haley Berkoe asks some of the biggest names in bitcoin and Silicon Valley 21 questions in 21 minutes, from the personalities you know and love to tech’s unsung heroes. A new episode drops when someone stops by Presidio Bitcoin. Reach out if you are or will be in the area and are interested in being on the show. presidiobitcoin.substack.com

12/17/2025

21 in 21: David Gumberg on the Chaincode ₿OSS Challenge and Becoming a Bitcoin Core Contributor

Haley Berkoe sits down with David Gumberg, a Bitcoin Core contributor at Localhost, a bitcoin-focused research center in the Bay Area. David shares how he got into bitcoin, what pushed him from curiosity to contribution, and how completing the Chaincode ₿OSS Challenge in 2024 helped him make the leap to contributing to Bitcoin Core full time. They also dig into what he’s focused on now in Core: Compact Block Relay, block propagation times, and why improving network latency can make mining more fair for smaller miners. bosschallenge.xyz (applications due Dec 31) github.com/davidgumberg x.com/ChaincodeLabs x.com/lclhostresearch x.com/HBerkoe

23 min
12/11/2025

21 in 21: Rod Roudi

In this episode of 21 in 21, Haley sits down with Rod Roudi, co-founder of Bitcoin Park in Nashville and Austin. Rod breaks down how Bitcoin Park began, why in-person energy fuels strong communities, and how Nashville grew into a hub for bitcoiners, policymakers, founders, developers, and bitcoin-curious locals. He also shares what he’s learned about bitcoin payments from the business side, why reducing merchant friction is essential, and what he’s looking forward to in 2026. Episode Chapters 00:00 Welcome Rod 01:44 Bitcoin Park Description 03:39 Origin Story 07:08 Engaging Policymakers and Local Community 13:38 Accepting Bitcoin as a Business 16:22 Merchant Adoption and Reducing Friction 20:22 College Basketball Break 21:47 What Rod Is Excited About in 2026 23:06 Where to Follow Rod & Bitcoin Park https://x.com/bitkite https://x.com/bitcoinpark_ https://x.com/HBerkoe

24 min
10/30/2025

21 in 21: Joe Carlo on How Bitcoin Changed Pink Owl Coffee Forever

Haley Berkoe sits down with Joe Carlo, co-owner of Pink Owl Coffee, a café that began in San Rafael, California, and has since expanded to three locations across the Bay Area. Pink Owl is one of the earliest Square merchants to integrate bitcoin into its business model. For several years, Joe and his partner Saandra have been converting a percentage of sales into bitcoin as part of their long-term savings strategy, and they recently joined Square’s beta program to begin accepting bitcoin payments directly, ahead of the public launch on November 10th. Joe shares how he first discovered bitcoin, what inspired him to use it as a small-business owner, and how he’s helped educate both customers and staff on what it means to pay (and save) in bitcoin. https://pinkowlcoffee.com/

24 min
10/28/2025

21 in 21: Kyle Olney

Kyle Olney joins Haley Berkoe to talk about defending bitcoin’s foundational freedoms. A longtime Silicon Valley product leader turned bitcoin advocate, Kyle helped launch Save Our Wallets, a coalition fighting for Section 109 of the Clarity Act, and the Satoshi Needs You campaign, a national call to action to protect open-source developers and the right to self-custody. Kyle shares his journey from seizing banks for the U.S. government during the 2008 financial crisis to championing bitcoin’s political and legislative future. He explains the legislative nuances of the Clarity Act, how the wrong version of this bill could endanger open-source developers, and how ordinary bitcoiners can take meaningful action. 00:00 Introducing Kyle Olney and saveourwallets.org 01:32 Kyle's journey to bitcoin advocacy 04:06 The importance of Save Our Wallets 05:46 Understanding the Clarity Act and BRCA 07:34 Getting the BRCA language written into U.S. law to protect open-source builder 8:58 Misconceptions in the bitcoin community 11:09 Why this affects everyone 14:36 The call to action 16:29 The Satoshi Needs You Campaign 19:10 Community collaboration and future outlook 22:19 How to get involved Save Our Wallets: https://x.com/saveourwalets, saveourwallets.org Kyle Olney: https://x.com/KyleOlney, https://www.linkedin.com/in/kyleolney/ Haley Berkoe: https://x.com/HBerkoe, https://www.linkedin.com/in/haleyberkoe/ Presidio Bitcoin: https://x.com/PresidioBitcoin, https://www.youtube.com/@PresidioBitcoin

25 min
10/21/2025

21 in 21: Nick Slaney

In this episode of 21 in 21, Nick Slaney joins Haley Berkoe during Presidio Bitcoin Design Week. Nick is the founder of Money Dev Kit, a new startup building tools that make it easy for developers to add bitcoin and Lightning payments to their applications. Previously, he was at Block, where he helped build Bitkey and c=, whose LDK node became one of the Lightning Network’s largest and most active. He shares why he’s betting on bitcoin over stablecoins, how Lightning service providers (LSPs) improve Lightning usability, and what gives him hope for bitcoin’s future. FOLLOW: Nick Slaney: https://x.com/nick_slaney Money Dev Kit: https://x.com/money_dev_kit Haley Berkoe: https://x.com/HBerkoe Presidio Bitcoin: https://x.com/PresidioBitcoin WATCH THE SHOW: https://www.youtube.com/@PresidioBitcoin

23 min
10/15/2025

21 in 21: Erik Cativo

During Bitcoin Design Week at Presidio Bitcoin, product designer and HRF grantee Erik Cativo joined the show to talk about designing the future of money. We get into his experiments with ecash and bitchat, the magic of bump-to-pay interactions, and how thoughtful UX can make bitcoin feel intuitive, private, and fun. Erik also shares lessons from living in a nearly cashless society, ideas for building “throw-cash” experiences inside apps like Cash App, and why anyone can help design better bitcoin products simply by giving feedback. FOLLOW: Erik Cativo: https://x.com/uxerik_, https://www.erik.day/ Haley Berkoe: https://x.com/HBerkoe Presidio Bitcoin: https://x.com/PresidioBitcoin WATCH THE SHOW: https://www.youtube.com/@PresidioBitcoin

26 min
10/02/2025

21 in 21: Kyle Fletcher

Haley Berkoe is joined by Kyle Fletcher, Principal Design Director at Block, to explore the intersection of bitcoin, design, and culture. They discuss why artists and designers play a critical role in shaping bitcoin’s future, the sats vs. bitcoin denomination debate, and how thoughtful design can help bring bitcoin to the masses. Kyle also shares personal influences, dream projects, and why onboarding artists, local merchants, and creative communities is key to bitcoin adoption. CHAPTER HIGHLIGHTS: 00:00 Intro & Kyle’s background at Block 01:01 State of Bitcoin brand creative 02:59 Designing future money: local and circular economies 05:55 The Intersection of art and bitcoin 08:19 The sats vs. bitcoin denomination debate 12:32 Design mentors, observation, and environment 15:39 Why Silicon Valley designers should care about Bitcoin 17:52 Dream projects: Bitcoin art galleries & philanthropy 22:11 Final thoughts: how creatives can get started with Bitcoin 23:13 Where to find Kyle online FOLLOW: Kyle Fletcher: https://x.com/kyleluvsew, https://www.linkedin.com/in/kylefletcher/ Block/Cash App: https://x.com/blocks, https://x.com/CashApp Haley Berkoe: https://x.com/HBerkoe, https://www.linkedin.com/in/haleyberkoe/ Presidio Bitcoin: https://x.com/PresidioBitcoin, https://www.linkedin.com/company/presidio-bitcoin LINKS: Presidio Bitcoin Design Week Summary: https://open.substack.com/pub/bitcoindesign/p/presidio-bitcoin-design-week?r=53cq2n&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false Kyle’s talk at Design Week: https://www.youtube.com/watch?v=YArvqMYy6nI Bitcoin Plushie: https://www.uncute.com/collections/everything-else/products/here-comes-bitcoin WATCH THE SHOW: https://www.youtube.com/@PresidioBitcoin

24 min
09/24/2025

21 in 21: Christoph Ono

In this episode of 21 in 21, Haley is joined by Christoph Ono, co-founder of the Bitcoin Design Foundation and longtime contributor to the Bitcoin Design Community. They talk about Bitcoin Design Week in San Francisco, the effort to redesign the Bitcoin Core wallet, and why design plays such a critical role in shaping the future of money. Christoph also shares how newcomers can get involved in the Bitcoin Design Community and why making bitcoin feel magical matters. Chapter Timestamps: 00:00 Intro & Christoph’s background 01:05 Bitcoin Design Week in San Francisco 02:51 Designing future money 04:59 Why Silicon Valley designers should care about bitcoin 06:40 How to join the Bitcoin Design Community 08:44 Redesigning Bitcoin Core’s original wallet 11:51 Designers and developers working together 13:48 Impactful projects & community contributions 17:51 Inspirations, books, and design influences 23:03 Final thoughts: making bitcoin magical 23:43 Where to follow Christoph FOLLOW: Christoph Ono: https://x.com/GBKS, https://www.linkedin.com/in/germanysbestkeptsecret/ Bitcoin Design Community: https://x.com/bitcoin_design Haley Berkoe: https://x.com/HBerkoe, https://www.linkedin.com/in/haleyberkoe/ Presidio Bitcoin: https://x.com/PresidioBitcoin, https://www.linkedin.com/company/presidio-bitcoin LINKS: Bitcoin Design 5 Year Report: https://five.bitcoin.design/ Understanding Comics by Scott McCloud: https://www.amazon.com/Understanding-Comics-Invisible-Scott-McCloud/dp/006097625X Bitcoin Design Community: https://bitcoin.design/ Bitcoin Design Foundation: https://bitcoindesignfoundation.org/ Bitcoin Design Week: https://event.bitcoin.design/ Christoph speaking at Bitcoin Design Week: https://youtu.be/EbFCoVtJKEc?si=JEVxnLCTFJGX9NdL Christoph’s Substack: https://gbks.substack.com/ WATCH THE SHOW: https://www.youtube.com/@PresidioBitcoin

25 min

Haley Berkoe asks some of the biggest names in bitcoin and Silicon Valley 21 questions in 21 minutes, from the personalities you know and love to tech’s unsung heroes. A new episode drops when someone stops by Presidio Bitcoin. Reach out if you are or will be in the area and are interested in being on the show. presidiobitcoin.substack.com

Creator

Hosted by Haley Berkoe
Years Active

2K
Episodes

29
Rating

Clean
Show Website

21 in 21

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Technology

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