⚡️ Bitcoin Sydney hosts an informal meetup on August 8th to discuss the Coldcard entropy bug. Discussion topics: • What the Coldcard entropy vulnerability actually is, in plain English • How to work out whether you’re affected, and what to do if you are • Verifiable seed generation: dice rolls, entropy you can audit yourself • Custody considerations: single-sig vs multisig, single-vendor risk, passphrases • Migration hygiene: moving funds without creating new risks in the process Bring your questions. Experienced Bitcoiners will be on hand. https://bitcoinonly.events/bitcoin-sydney-coldcard-entropy-bug-custody-considerations/

⚡️ The Auckland Bitcoin Meetup is a recurring monthly gathering held on the third Sunday of each month. In the second half of 2026, the meetup takes place at Node Space in Devonport. Next up is on August 17th. https://bitcoinonly.events/auckland-bitcoin-meetup-2608/

We've just dropped a fresh article on the latest developments around the #Coldcard exploit. https://bitcoinonly.events/coldcard-losses-near-90m-as-attackers-start-cracking-passphrases/

📆 Save the date: August 21, London Hosted by Antidote, Mempool Dev Day is bringing together Bitcoin developers, builders, and curious hackers for a day of workshops, collaboration, and good conversations. 🎟 Free to attend 🔗 https://bitcoinonly.events/mempool-dev-day-london/

A lot of people might be concerned about the ColdCard issues. The Bitcoin Sundays LA family is gathering Sunday at Huntley Hotel in Santa Monica to talk about it and help each other with it. https://bitcoinonly.events/bitcoin-sundays-la-happy-hour-2608/

💥 Coinkite has warned users of its #Coldcard Mk3 signing device to move their funds after identifying a potential flaw in how certain firmware versions generated wallet seed phrases. https://bitcoinonly.events/coldcard-issues-mk3-security-warning-as-experts-probe-38m-bitcoin-sweep/

🇮🇪 Come join the inaugural Bitcoin Wexford Community Meetup on Thursday, July 30 at Red Books. Fix the money and we fix the world. https://bitcoinonly.events/bitcoin-wexford-community-meetup-2607/

⚡️ Lightning Labs, the San Francisco-based company behind the widely used LND Lightning Network implementation, has announced the alpha release of Wavelength, a developer toolkit designed to make integrating Bitcoin payments into applications dramatically simpler—and to put those payments within reach of AI agents for the first time. https://bitcoinonly.events/lightning-labs-wavelength-lets-developers-and-ai-agents-add-bitcoin-payments/

⚡️ Jack Dorsey’s payments and software company Block has launched Buzz, an open-source group chat and collaboration platform designed to put human employees and AI agents into the same workspace. Buzz combines channels, threads, direct messages, voice, media sharing, code repositories, and automated workflows into a single interface. Block says that Buzz is “model-agnostic,” meaning teams can plug in agents built on Claude Code, Codex, Goose, or custom-built frameworks, so organizations are not locked into any single AI provider. https://bitcoinonly.events/jack-dorseys-block-launches-buzz-an-open-source-slack-and-github-rival-built-on-nostr/

🌆 Columbus, Ohio will host the inaugural Midwest Bitcoin Summit on September 23-24, and if CEO and co-founder Andrew Tillman has his way, it won’t look like every other Bitcoin conference you’ve been to. 🔗 https://bitcoinonly.events/midwest-bitcoin-summit-aims-to-bring-bitcoin-to-the-rust-belt/