Blockstream CEO Adam Backs Blames Nick Carter Over Bitcoin Quantum Threat Claims
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Blockstream CEO Adam Temeles has publicly disputed claims that Bitcoin faces an imminent threat from quantum computing, criticizing Castle Island Ventures founding partner Nick Carter for publicly highlighting those concerns.
Key Takeaways:
Adam Back claims that Bitcoin's quantum risk is being quietly resolved without public alarm.
Nick Carter argues that the threat is real and many developers are in denial.
The debate reflects a divide over how pressing quantum computing concerns are for Bitcoin.
The exchange launched after Carter explained why Castle Island Ventures invested in Project Eleven, a startup developing defenses against potential quantum attacks on Bitcoin and other crypto networks.
Back fired back, accusing Carter of raising unnecessary alarm. “You make an unknown noise and try to move the market or something. It's not helping,” Buck wrote in a post on Friday.
Adam Back says Bitcoin developers are quietly preparing for quantum risks.
They argued back that the Bitcoin ecosystem is not ignoring the long-term risks of quantum computing.
Instead, developers and researchers are working on potential defenses, but prefer not to make the issue a public spectacle, he said.
In his view, the discussion has been skewed by exaggeration rather than basic technical evaluation.
Carter rejected this behavior and a significant part of the Bitcoin community refused to face the issue seriously.
He said many developers are still in “total denial” that quantum machines powerful enough could one day undermine Bitcoin's cryptographic foundations.
While the investment itself has recently been the subject of online controversy, Carter said Castle Island announced its support for Project Eleven about eleven weeks ago.
In a Substack post on Oct. 20, he said the disclosure was already made. “I quantified this in the first sentence of my original article,” Carter says.
Carter described himself as having been given a “quantum pill” by Project Eleven CEO Alex Prudden, whose talks convinced him that quantum computing would pose an immediate, if not serious, threat to blockchain systems.
“I was very concerned about blockchain quantum risks. I put capital behind my losses, always have,” he said, adding that he expects criticism and has made his financial exposure clear upfront.
As Carter outlined the case, he pointed to governments preparing for a post-quantum world, increasing investment in quantum companies, and that bitcoin itself could act as a powerful catalyst for breakthroughs in quantum technology.
The Bitcoin Quantum Debate Widens as Timelines and Concerns Divide Investors
The debate extends back and beyond Carter.
Capriole Investments founder Charles Edwards recently warned that quantum computing could be a real threat to Bitcoin in two to nine years unless the network evolves to quantum-resistant encryption.
Others are skeptical. Multimillionaire investor Kevin O'Leary has argued that using quantum machines to attack Bitcoin is a poor use of the technology, suggesting it is more valuable in fields such as medical research and artificial intelligence.
Back acknowledged the need to make bitcoin “quantum ready,” but practical concerns remain for decades, describing the technology as still “ridiculously early” and limited by major research hurdles.
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