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Greetings Bitcoiner,
Welcome to Issue #612 of Bitcoin Breakdown, where we’re bringing you your end-of-week Bitcoin Digest featuring all the need-to-know Quick Bits snippets and Quick Media. But first, today’s Top Stories:
Today's issue is about who controls the keys, the exposure, and the gains. Coinkite tells affected Coldcard users to create new seeds and move funds, Santander disclosed a $4.3 million IBIT position, and South Korea is holding to a 2027 tax start while repeal remains possible. Bitcoin sovereignty depends on the custody structure beneath each headline.
This week's Coldcard disclosure exposes a basic failure: a hardware wallet can look secure while generating a predictable seed.
Jade Plus mixes randomness from several independent sources, including its hardware generator, camera, user input and the Blockstream app. Its hardware and firmware are public for review, and it can sign by QR without connecting to a computer.
Use code bitcoinbreakdown for 10% off Jade Plus.
If your Coldcard seed was created with affected firmware, a new device is only part of the fix. Generate a new wallet on the replacement and move the funds. Updating Coldcard firmware or importing the old seed does not make that seed safe.
🚨 Coldcard Seeds Need Replacing After the Entropy Warning
Coinkite warns affected Coldcard seeds must be replaced with completely new seeds after fixed firmware is installed. Block includes Mk4, Q, and Mk5 in its affected model set, while a July 30 sweep of about 594.5 BTC shows the cost of weak key generation.
Why it matters: Coldcard firmware updates protect future seed generation, not keys already created. This means affected users need a newly generated wallet and must move the funds. Read more→
🏦 Santander Discloses a $4.3 Million IBIT Position
Banco Santander's second-quarter filing listed 129,615 shares of the iShares Bitcoin Trust exchange-traded fund. The Securities and Exchange Commission table reported the position at $4,314,883. The filing covered the quarter ended June 30 and was signed July 28.
Why it matters: The SEC filing records measurable institutional exposure through familiar securities rails. ETF shares preserve custodians and legal claims, while self-custody gives holders direct control over bitcoin. Read more→
🇰🇷 South Korea Puts Its 2027 Bitcoin Tax Back in Play
Deputy Prime Minister Koo Yun-cheol reaffirmed South Korea's planned 2027 tax on Bitcoin and crypto gains. Current law sets a 22% combined rate above 2.5 million won, while a repeal bill remains in subcommittee. The scheduled start remains January 1, 2027, unless lawmakers repeal or delay it.
Why it matters: The state is advancing a claim on qualifying gains while lawmakers can still reject it. Bitcoin's fixed issuance remains outside the government's control and reach. Read more→
Upbit, a South Korean exchange, sees trading volume jump 600% as the country's KOSPI stock index drops nearly 18%, with Bitcoin remaining resilient amid the sell-off.
Vida Global, an NYSE-listed AI company, pays some employees in bitcoin via Voltage's Lightning network while keeping its balance sheet fully in US dollars.
Thomas Massie,Kentucky congressman, plans legislation blocking federal funds to agencies using Flock license plate cameras amid growing privacy backlash in the country.
Bhutan's Gelephu Mindfulness City, a planned digital financial hub, names Toronto based 3iQ Corp as first external manager of its sovereign BTC treasury.
Russian authorities move BitRiver founder Igor Runets, head of Russia's largest mining firm, from house arrest to pre-trial detention over a $12.5M fraud case involving energy company En+.
US Internal Revenue Service issues a warning about scammers mailing fake letters pushing a nonexistent 'Digital Asset Compliance Portal' to steal assets and data.
China Business Journal, a state-affiliated Chinese newspaper, warns that fraudsters are impersonating it and demanding bitcoin payments to suppress fake investigative reports targeting companies.
Hyperscale Data, an AI data center and Bitcoin treasury firm, sells 100 BTC to fund its Michigan campus while keeping 1,000+ BTC as loan collateral.
Wintermute, a leading market maker, reports that institutions now drive a record 72% of spot trading volume on its over-the-counter (OTC) desk.
Vanguard's index fund VTSAX passively adds 269,200 shares of Bitcoin treasury firm Strive, now holding $23.7M worth of the company shares in total.
Ontario Securities Commission, a Canadian financial regulator, reports that a survey of more than 2000 Canadians showed Bitcoin and crypto ownership rising to 25% in 2026, up from 10% in 2023.
Luno, a London based exchange owned by Digital Currency Group, cuts 20% of staff globally, citing automation reshaping its operations as a reason.
GrapheneOS, a privacy focused Android alternative, defends its duress PIN feature as Atlanta activist Samuel Tunick faces federal charges in the US after wiping his phone during a warrantless border search.
ForrestHODL also covers Coldcard's firmware-related entropy flaw may expose seed-only wallets, urging users to verify funds, use passphrases, dice rolls and migrate funds securely (Jul 31 | 16:20 min watch).
NVK of Coinkite, in an interview with Rob Wallace of Bitcoin News, warns that bitcoin self-custody, real UTXOs, Coldcard security and exchange withdrawals are becoming urgent, ironically released on the same day as Coldcard's security incident (Jul 31 | 17:48 min watch).
Presidio Bitcoin's PBJ podcast hosts discuss why Block’s Buzz could become a major open-source workspace, using Nostr to deliver user-owned identity, flexible hosting, lower switching costs, and Silicon Valley’s first practical taste of decentralized collaboration (Jul 28 | 14:19 min watch).
Julian Figueroa of The Exit Manual breaks down the 2008 financial crisis on a mountain hike, exposing $28T in secret Federal Reserve loans, ratings agency fraud, and why Bitcoin emerged as an alternative to central bank corruption (Jul 31 | 11:47 min watch).
Rustin of Simply Bitcoin argues that prosecutions of Samourai and Tornado Cash developers, the GrapheneOS phone controversy, FBI pre-crime AI, and a flawed Clarity Act reveal state repression that will only drive more users toward self-custody and privacy tools (Jul 30 | 22:39 min watch).
Adam Livingston, in a video for Swan Bitcoin, says Bitcoin's fixed supply positions it to absorb part of the $900T global monetary premium trapped in real estate, bonds, equities, and gold, potentially driving prices above $1M per coin (Jul 29 | 22:03 min watch).
ForrestHODL also covers Coldcard's firmware-related entropy flaw may expose seed-only wallets, urging users to verify funds, use passphrases, dice rolls and migrate funds securely (Jul 31 | 16:20 min watch).
NVK of Coinkite, in an interview with Rob Wallace of Bitcoin News, warns that bitcoin self-custody, real UTXOs, Coldcard security and exchange withdrawals are becoming urgent, ironically released on the same day as Coldcard's security incident (Jul 31 | 17:48 min watch).
Presidio Bitcoin's PBJ podcast hosts discuss why Block’s Buzz could become a major open-source workspace, using Nostr to deliver user-owned identity, flexible hosting, lower switching costs, and Silicon Valley’s first practical taste of decentralized collaboration (Jul 28 | 14:19 min watch).
Julian Figueroa of The Exit Manual breaks down the 2008 financial crisis on a mountain hike, exposing $28T in secret Federal Reserve loans, ratings agency fraud, and why Bitcoin emerged as an alternative to central bank corruption (Jul 31 | 11:47 min watch).
Rustin of Simply Bitcoin argues that prosecutions of Samourai and Tornado Cash developers, the GrapheneOS phone controversy, FBI pre-crime AI, and a flawed Clarity Act reveal state repression that will only drive more users toward self-custody and privacy tools (Jul 30 | 22:39 min watch).
Adam Livingston, in a video for Swan Bitcoin, says Bitcoin's fixed supply positions it to absorb part of the $900T global monetary premium trapped in real estate, bonds, equities, and gold, potentially driving prices above $1M per coin (Jul 29 | 22:03 min watch).
ForrestHODL, in episode 5 of his Bitcoin fundamentals series, explains UTXOs as the real foundation of wallet balances, showing how coin selection, change addresses, byte-based fees, confirmations, and privacy practices help users master Bitcoin self-custody (Jul 31 | 14:53 min watch).
Stephan Livera, a Bitcoin podcaster, warns Coldcard users about the recent vulnerability and suggests immediate and long term steps that can be taken to improve self-custody setups (Jul 31 | 1:58 min watch).
Bitcoin Ekasi, a South African grassroots initiative, shares clips of real-time Bitcoin payments being made in Kenyan shops via its own community-run Fedimint federation using Start9 hardware (Jul 28 | 1:08 min watch).
Thg of BTCPay Server demonstrates the product's new multisig wallet feature enabling 2-of-3 setups, hardware wallet integration via BTCPay Vault, signature tracking, and email notifications for secure treasury management without single-party custody (Jul 28 | 5:26 min watch).
Cory Klippsten, CEO of Swan Bitcoin, in an interview with Danny Knowles of What Bitcoin Did, urges aspiring leaders to 'rally the troops' during tough market conditions (Jul 29 | 2:19 min watch).
Btrust, a non-profit supporting Bitcoin software development in the Global South, launches the trailer for 'Btrust in Focus,' a nine-episode series featuring builders, educators, and community leaders (Jul 31 | 1:15 min watch).
Abdullahi, a Btrust grantee and LND contributor, speaking at Bitcoin++ Open Source Edition, demonstrates how to build an L402-gated API using Aperture, showing developers how Lightning invoices and macaroons enable permissionless, KYC-free payment authentication for open-source services (Jul 23 | 80:47 min watch).
Ojok Emmanuel Nsubuga, contributor to Blue Wallet, speaking at Bitcoin++ Open Source Edition, provides an explanation on reproducible builds, urging developers to pin dependencies, remove non-deterministic elements, and let users verify that binaries match GitHub source code to prevent theft (Jul 26 | 12:29 min watch).
Jack Mallers, Strike founder and former Twenty One Capital CEO, in an interview with Natalie Brunell of Coin Stories, talks about his decision to step down from the Bitcoin treasury firm and reflects back on the lessons he has learnt during his time as CEO of the company (Jul 30 | 65:56 min watch).
Mauricio Di Bartolomeo, co-founder and CSO of Ledn, in an interview with Nico of Simply Bitcoin at Mining Disrupt 2026, discusses why Bitcoin's global liquidity, self-custody and seizure resistance make it uniquely powerful collateral (Jul 31 | 27:08 min watch).
Bitcoin Island argues that boring habits like cutting unused expenses, dollar-cost averaging, avoiding leverage, self-custody, resisting lifestyle inflation, and stacking BTC from side income help ordinary earners build one whole bitcoin over time (Jul 30 | 12:57 min watch).
Bitcoin Mechanic, a leading proponent of BIP110, warns Coldcard users that alleged weak seed entropy across Coinkite devices puts bitcoin funds at risk, urging immediate migration to new wallets, dice-generated entropy, and multisig before attackers drain more accounts (Jul 31 | 4:00 min watch).
Tony of The Bitcoin Way argues that running a Bitcoin node is essential for true sovereignty because it lets users verify bitcoin balances, enforce network rules, improve privacy, and stop relying on third-party infrastructure (Jul 30 | 12:10 min watch).
Matthew Kratter argues that Michael Saylor and Strategy undermine Bitcoin by promoting TradFi stocks, custodial bitcoin, dollar dominance, anti-medium-of-exchange messaging, DeFi ties, and narratives that weaken self-custody, nodes, and Bitcoin sovereignty (Jul 29 | 11:27 min watch).
Mark Moss, macro and financial commentator, argues that record leverage, sovereign debt, AI disruption, and Fed liquidity rescues make a 2008-style cash-waiting strategy risky, favoring scarce assets like gold, hard assets, and bitcoin before forced selling and dollar debasement accelerate (Jul 28 | 20:55 min watch).
