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Local time: Timezone: (UTC +03:00) EEST (Helsinki, Kyiv, Riga, Sofia)Date: Mon, Oct 20, 2025Time: 08:00 PM - 11:00 PM

Location: SuiHub, Agiou Markou 22, Athens

Website: https://www.meetup.com/blockchaingreece-0/events/311289491/

Bitcoin & Blockchain Tech Meetup Athens – Scaling Bitcoin Payments and The Quantum Threat to Bitcoin

Bitcoin & Blockchain Tech Meetup Athens - Scaling Bitcoin Payments and The Quantum Threat to Bitcoin

Bitcoin & Blockchain Tech Meetup Athens welcome Steven Roose, co-founder and CEO at Second, as well as the rest of the Second team in Athens!

Second is one of the two teams implementing the Ark protocol that promises self-custody and scalable payments on Bitcoin. We are honored to host Christian Papathanasiou, the co-founder qBTC, a quantum-safe sidechain version of Bitcoin, and co-author, together with Jameson Lopp, of the recent Post Quantum Migration and Legacy Signature Sunset BIP.

Join us to:

  • Learn firsthand how Ark could enable faster, cheaper Bitcoin transactions without giving up custody.
  • Discover the quantum threat to Bitcoin and cryptocurrencies and the proposed solutions.
  • Get early insights directly from the builders shaping Bitcoin’s next big leaps.
  • Connect with fellow Bitcoiners, developers, and crypto enthusiasts in Athens.
  • Enjoy relaxed networking over pizza & drinks after the talks.

The presentations will be in English. Attendance is free — just bring your curiosity.

🗓 Monday, October 20, 2025
🕔 Time: 8:00 PM – 11:00 PM EEST
📍 SuiHub
Agiou Markou 22 · Athens

Bitcoin & Blockchain Tech Meetup Athens is a community for those interested in discussing and participating in the research and development of Bitcoin and Bitcoin-related protocols. You can be well versed with or new to the topics, all are welcome. Be advised: discussion will be ***technical***.

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