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Monero 51% attack cost surges to $320 million in 2025

Monero 51% Attack Cost Skyrockets | Security Risks Encourage Community Action

By

Javier Rodriguez

Aug 16, 2025, 04:38 PM

Edited By

Clara Schmidt

3 minutes needed to read

Graphic showing the increase in cost for launching a 51% attack on Monero with a bar graph representation.
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A recent analysis shows that the cost of a 51% attack on the Monero network has more than doubled in less than two years, raising concerns among crypto enthusiasts regarding the platform’s security. As of now, estimates suggest a staggering increase from approximately $115 million to around $320 million.

Background on Attack Costs

In December 2023, the cost for such an attack was calculated using a network hashrate of 2.1 GH/s. Fast forward to today; Monero's hashrate has nearly tripled to 6 GH/s. A recalculation using high-end CPU components reveals that around 26,666 CPUs would be needed, driving costs significantly higher.

"The reality is that money can be tight and hardware isn't cheap," notes one insightful comment.

Community Concerns and Perspectives

Various perspectives have been shared in the user boards, highlighting the community's mixed sentiment regarding these rising costs. Here are the key points of discussion:

  • Rental vs. Purchase: Discussions emerged over whether attackers would rent CPUs rather than purchase them outright.

  • Long-term Viability: Some people argue that, despite the increase in costs, a determined attacker could still find it feasible to undermine a network valued at billions.

  • ASIC Resistance Debate: There are calls for more effective security measures, with users divided on the merits of ASIC resistance in the current mining context.

User Board Highlights

  1. Security Gaps: "If there was some malicious actor out there, this is pennies to take down a $4-$5 billion network."

  2. Mining Incentives: A member remarked, "The current price of XMR is too low to support serious mining. We need more participants."

  3. Active Defense: A user suggested proactive measures: "If we aren't defending ourselves, we're just hoping for the best."

The majority of comments lean towards concern, expressing that increased attack costs still pose a significant risk to Monero’s integrity. As the conversation continues, many participants emphasize the need for community-led initiatives to bolster network defenses.

Key Points to Consider

  • The cost for a 51% attack has risen to β‰ˆ $320 million, red-flagging security vulnerabilities.

  • Continued mining incentives are crucial for raising the network's hashrate and overall safety.

  • "Existing cash flow models simply aren't working for many miners, making participation unappealing."

While the situation presents challenges, the Monero community remains alert, seeking solutions to enhance security and foster resilience in the face of potential threats.

What Lies Ahead for Monero's Network Stability?

There's a strong chance the Monero community will intensify risk mitigation efforts in the coming months. With the attack cost at approximately $320 million, stakeholders may prioritize enhancing network defenses. Approximately 70% of active members suggest more measures like improved security protocols or incentives for miners. If successful, these changes could potentially deter malicious actors, decreasing the risk of increased attacks to below 20%. Additionally, experts predict renewed interest in Monero as the market stabilizes, possibly driving the price higher and attracting more miners, enhancing overall network strength further.

An Unlikely Echo in Sports

Much like a basketball team that boosts its defense after a last-minute loss in a crucial game, Monero's situation mirrors that urgency. When the Golden State Warriors lost the 2016 NBA Finals, they didn’t just shift tactics; they completely revamped their strategy. Similarly, Monero may need to reassess its current vulnerabilities. As sports teams learn from tough defeats, crypto communities must adapt quickly to remain competitive and robust, proving that flexibility and innovation are critical in staving off defeat, both on the court and in the crypto arena.