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December 20, 2025

Quantum Computing Threat To Bitcoin: Discussion Between Blockstream CEO Adam Back And Castle Island Ventures’ Nic Carter

"Adam Back and Nic Carter passionately discussing Bitcoin's vulnerability to quantum computing illustrated in vivid Orange and deep Blues, symbolizing brand color scheme, with Bitcoin symbols emphasizing the controversy in a 1200 x 628 pixels layout."
Adam Back, the CEO of Blockstream, has recently criticized Nic Carter, a founding partner of Castle Island Ventures, suggesting he is fueling concerns regarding threats to Bitcoin through quantum computing. Back addressed the situation through a social media post last Friday, accusing Carter of spreading unfounded worries.

Back Calls Out Carter’s Claims

According to Back, Carter’s concerns about quantum computing threats to Bitcoin are misleading and potentially manipulative.Carter had previously explained that Castle Island Ventures decided to invest in the radical startup, Project Eleven, which aims to develop shields against quantum computing’s possible threats to Bitcoin and diverse crypto assets.
However, Back countered that the Bitcoin community is already aware of these future probabilities and are working quietly on developing a solution. He suggests that their effort does not need to turn into panicky noise that could influence the market negatively.

Defiance From Castle Island Ventures

Carter, on the other hand, refuted Back’s assertions, arguing that many Bitcoin developers are avoiding the idea of quantum computing posing a significant risk to Bitcoin. He, along with his Venture, champions the opinion that safeguards against quantum threats are necessary.
Moreover, he pointed out that his investment in projects like Project Eleven came from his real concern about the potential threat, not market manipulation. He became extremely worried about quantum threats to blockchains, leading him to place capital into the project.
Furthermore, Carter argued that he has been transparent about his venture’s financial exposure, anticipating such faith criticisms.

The Quantum Threat to Bitcoin

Carter elaborated his reasons for believing quantum computing poses a risk to Bitcoin. These included governments planning for a post-quantum world, Bitcoin itself serving as a bug bounty for quantum dreams, and the increasing investment in quantum firms.
However, while Carter’s concerns dominate one side of the debate, other experts believe the risks of quantum computing to Bitcoin are either negligible or far-off. Notable voices include Charles Edwards, founder of Capriole Investments, who warned that Bitcoin might face a genuine risk from quantum computing in the next two to nine years unless network upgrades are implemented.
On the other hand, multi-millionaire entrepreneur Kevin O’Leary argued that using quantum computing to break Bitcoin’s security wouldn’t be the most effective utilization of the technology. He suggested it would be far more valuable in areas like AI-driven medical research.

Quantum Threat: A Distant Concern?

Meanwhile, Back voiced his opinion saying that Bitcoin being quantum-ready is a good thing but maintained that it won’t pose an immediate threat. He asserts that the technology is still in its nascent stages and has many research and development hurdles to clear before it becomes a formidable challenge. His stance suggests that while being prepared for a quantum computing world is prudent, alarmism and market manipulation aren’t helpful.
In conclusion, it’s evident that the debate surrounding quantum threats to Bitcoin is far from over. With a rift clearly forming within the Bitcoin community, it will be intriguing to observe how this dialog unfolds and what steps will be taken to confront or allay these challenges. As of the present moment, there’s certainty that opinions differ, and the terrain is muddled with speculation and discordant assertions.

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James Carter

Financial Analyst & Content Creator | Expert in Cryptocurrency & Forex Education

James Carter is an experienced financial analyst, crypto educator, and content creator with expertise in crypto, forex, and financial literacy. Over the past decade, he has built a multifaceted career in market analysis, community education, and content strategy. At AltSignals.io, James leads content creation for English-speaking audiences, developing articles, webinars, and guides that simplify complex market trends and trading strategies. Known for his ability to make technical finance topics accessible, he empowers both new and seasoned investors to make informed decisions in the ever-evolving world of digital finance.

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