CoinDesk Podcast Network

Blockspace: Google's Quantum Bitcoin, Fold credit card, and Bitcoin Volatility Index

Apr 2, 2026
Cole Kennelly, CEO of Volmex Finance, builds Bitcoin volatility benchmarks. Will Reeves, CEO of Fold, leads Bitcoin rewards and payments. Brian Harrington organizes Bitcoin personal finance and local circular-economy efforts. They debate Google’s quantum paper and blockchain risk. They unpack Fold’s new Bitcoin credit card rollout and treasury choices. They outline the rise of institutional-grade Bitcoin volatility indices.
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INSIGHT

Blockchains Face Different Quantum Upgrade Paths

  • Bitcoin and Ethereum face different upgrade challenges: Ethereum's foundation can coordinate upgrades across smart-contract stacks, while Bitcoin's slow, conservative consensus process risks lagging.
  • Taproot took years; a quantum-ready Bitcoin upgrade needs planning now to avoid being flat-footed if timeline accelerates.
ANECDOTE

Brian's Shift From Maximalism To Practical Custody

  • Brian Harrington described his shift away from Bitcoin maximalism after community disputes and changing priorities.
  • He now holds Bitcoin with custodial services like Fidelity and emphasizes practicality over ideological self-custody.
ADVICE

Prioritize Income Alongside Bitcoin Stack

  • Build income streams alongside long-term Bitcoin holdings rather than relying solely on withdrawals from a volatile stack.
  • Brian pairs Bitcoin with real estate and emphasizes ramping up income to handle life events and volatility.
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