According to BitMEX Research, the Bitcoin (BTC) Lightning Network faces significant security risks from future quantum computers, which could break its underlying ECDSA cryptography. The research outlines a detailed proposal for making Lightning Network transactions quantum-resistant by implementing post-quantum cryptography (PQC) standards, such as a one-time signature scheme. While this proposed upgrade could lead to larger transaction sizes and increased complexity, BitMEX Research emphasizes that it is a crucial measure to safeguard the long-term security of funds transacted on Bitcoin's primary layer-2 scaling solution.

According to @BitMEXResearch, Lamport signatures, a type of hash-based digital signature scheme, are presented as a simple and viable solution for making Bitcoin (BTC) quantum-safe. The research suggests that while there is no concrete evidence of an imminent threat to Bitcoin from quantum computing, the first step towards mitigation is to provide users with the option to spend their BTC using quantum-safe methods. @BitMEXResearch posits that the level of user adoption for such features will be the primary driver for any subsequent developments in securing the network against future quantum risks.

According to @BitMEXResearch, a potential strategy to mitigate the risks posed by quantum computing to cryptocurrencies like Bitcoin (BTC) involves a three-step, ordered approach. The first step proposed is the creation of a new quantum-resistant spend type within the network, as cited in the post. Following this, if these new quantum-resistant spends gain significant popularity, the second step would be to consider banning new transactions to older, quantum-vulnerable addresses after a substantial grace period. The final step outlined by @BitMEXResearch is to implement a quantum-safe signature scheme for all new Unspent Transaction Outputs (UTXOs), securing future transactions against potential quantum threats.

According to @AltcoinGordon, a recent $8 billion Bitcoin (BTC) transfer by a Satoshi-era whale is likely a wallet security upgrade rather than a market sale, as suggested by on-chain analytics firm Arkham. The funds were moved from legacy addresses to more secure and efficient native SegWit bc1q-style addresses, and Arkham reports the BTC remains untouched. Ledger CTO Charles Guillemet noted that legal notices sent via OP_RETURN messages to the old wallets may have prompted the owner to move the funds as a precautionary measure. This event highlights the growing importance of wallet security, which is further underscored by the imminent threat of quantum computing, or 'Q-Day'. Experts like IBM Quantum's Jay Gambetta warn that 'Harvest Now, Decrypt Later' attacks are already underway. The crypto market faces significant risk, with researchers estimating 4 million BTC are vulnerable, and BlackRock has officially listed quantum computing as a risk in its Bitcoin ETF filing. Ethereum co-founder Vitalik Buterin has already proposed emergency hard-forks to address this cryptographic threat, but researchers at the University of Kent warn such an upgrade could lead to 75 days of downtime for the Bitcoin network, posing a major risk to the asset class.

According to Eric Balchunas, the advent of quantum computing, or 'Q-Day,' presents a catastrophic and immediate threat to the entire cryptocurrency market, including Bitcoin (BTC) and Ethereum (ETH). The core risk stems from 'Harvest Now, Decrypt Later' attacks, where, as IBM Quantum's Vice President Jay Gambetta warns, nation-states are already collecting encrypted data to be broken by future quantum computers. This risk is so significant that BlackRock, in its Bitcoin ETF filing, cited quantum advances as a critical threat that could 'undermine the viability' of current cryptographic standards. Researchers estimate that 4 million Bitcoin, or 25% of the usable supply, are vulnerable. For Ethereum, co-founder Vitalik Buterin has already proposed emergency hard-forks, which could lead to prolonged network downtime. While some predict Q-Day is 5-7 years away, a Reuters report cites Tilo Kunz of Quantum Defen5e suggesting it could be as early as 2025. The article concludes that for traders and investors, the only path forward is an urgent migration to post-quantum cryptography, as existing digital assets without such security could become worthless.

According to @AltcoinGordon, the cryptocurrency market faces an imminent existential threat from quantum computing, known as 'Q-Day,' which could render current blockchain encryption obsolete. Experts like Jay Gambetta of IBM Quantum warn that malicious actors are already engaging in 'Harvest Now, Decrypt Later' attacks, storing encrypted data to break with future quantum computers. This risk is now being acknowledged by major institutions, with BlackRock including quantum computing as a critical risk in its Bitcoin ETF filing. Researchers estimate that 4 million Bitcoin (BTC), or 25% of the usable supply, are vulnerable. Ethereum (ETH) is also at risk, prompting co-founder Vitalik Buterin to propose emergency hard-fork solutions. Some experts, like Tilo Kunz of Quantum Defen5e, suggest Q-Day could arrive as soon as 2025. In response, solutions like the Quranium QSafe Wallet are emerging, utilizing post-quantum cryptography. This threat looms over a market already experiencing volatility, with BTC and ETH prices recently dipping due to geopolitical tensions. However, Charmaine Tam of Hex Trust notes that ETH's recent outperformance over BTC could be a leading indicator for a broader altcoin rally. Concurrently, regulatory pressure is increasing globally, as seen with Singapore's Monetary Authority (MAS) tightening rules on offshore crypto firms, a move likely influenced by the collapses of Singapore-domiciled entities like Three Arrows Capital and Terraform Labs.

According to @AltcoinGordon, the cryptocurrency market faces an existential threat from quantum computing, known as "Q-Day," which could render current encryption obsolete. Experts like Jay Gambetta from IBM Quantum warn that malicious actors are already conducting "Harvest Now, Decrypt Later" attacks, stockpiling encrypted data to be broken by future quantum computers. The risk is so significant that BlackRock included it in its Bitcoin ETF filing, with researchers estimating 4 million BTC are vulnerable. In response, Ethereum co-founder Vitalik Buterin has proposed emergency hard-fork solutions for ETH. Buterin also cautioned that the entire ecosystem is at an "inflection point," where projects must prove their decentralization or fail. Amid these security concerns, key ecosystem developments are unfolding: the Bitcoin Layer-2 network Botanix has launched its EVM-compatible mainnet with 5-second block times, and Ripple's XRP Ledger has deployed its EVM sidechain, using XRP as the gas token to enhance interoperability. Furthermore, institutional adoption is growing, with Robinhood building its own Arbitrum-based Layer-2 for tokenized assets and Deutsche Bank planning a crypto custody service.

According to @_RichardTeng, the threat of 'Q-Day'—the point at which quantum computers can break current encryption—is an immediate crisis for the cryptocurrency market, not a future problem. Malicious actors are already engaging in 'Harvest Now, Decrypt Later' attacks, storing encrypted data to be broken by future quantum computers, a warning echoed by IBM Quantum's Jay Gambetta. This systemic risk is so significant that BlackRock cited quantum computing as a critical risk in its Bitcoin (BTC) ETF filing, stating it could 'undermine the viability' of cryptographic algorithms. Researchers warn that approximately 4 million BTC, or 25% of the usable supply, are vulnerable. Ethereum (ETH) is also exposed, with co-founder Vitalik Buterin having proposed emergency hard-forks that could pause the network for years. With some experts like Tilo Kunz suggesting Q-Day could arrive as soon as 2025, the article stresses that the only solution is an urgent migration to post-quantum cryptography, a process that itself could cause massive network downtime and market disruption.

According to @KookCapitalLLC, the cryptocurrency market faces a significant long-term threat from quantum computing, which could render current encryption obsolete. Researchers warn that approximately 4 million Bitcoin (BTC), or 25% of the usable supply, are vulnerable to being stolen once quantum computers are powerful enough, a risk factor now included in BlackRock's Bitcoin ETF filing. The analysis suggests "Harvest Now, Decrypt Later" attacks are already underway, with some experts cited in a Reuters report warning that a cryptographically relevant quantum computer could arrive as soon as 2025, making migration to post-quantum cryptography urgent. In more immediate market events, the Polyhedra (ZKJ) token plummeted over 80% following what the team described as a coordinated liquidity attack on PancakeSwap. The Polyhedra team responded by injecting approximately $30 million in USDT, USDC, and BNB to stabilize liquidity and has announced a buyback plan to restore investor confidence. Other notable developments include JPMorgan piloting a permissioned USD deposit token (JPMD) on the Base network and the U.S. Senate passing a bipartisan stablecoin bill, signaling growing institutional and regulatory engagement with the crypto sector.

According to @AltcoinGordon, the cryptocurrency market faces an imminent existential threat from quantum computing, known as 'Q-Day,' which could break the encryption securing assets like Bitcoin (BTC) and Ethereum (ETH). Researchers warn that approximately 4 million BTC are vulnerable, a risk now cited in BlackRock's Bitcoin ETF filing. The 'Harvest Now, Decrypt Later' strategy, where malicious actors are currently storing encrypted data for future decryption, is a present danger highlighted by IBM Quantum's Jay Gambetta. In response, Project Eleven has raised $6 million in a round co-led by Variant Fund and Quantonation to build defenses. The company is launching 'Yellowpages,' a post-quantum cryptographic registry that allows users to create a verifiable link between their existing BTC address and a new quantum-resistant key without requiring a contentious network hard fork. This approach contrasts with proposals like QRAMP, offering a potentially faster, consensus-free path to security as experts like Tilo Kunz warn Q-Day could arrive as soon as 2025, making proactive measures critical for traders and investors.

According to @Ultra_Calls, the cryptocurrency market faces a significant long-term threat from quantum computing, or 'Q-Day', which could render current encryption for assets like Bitcoin (BTC) and Ethereum (ETH) obsolete. The report highlights that BlackRock has added quantum computing as a critical risk in its Bitcoin ETF filing, and researchers warn that up to 4 million BTC could be vulnerable. This risk is amplified by 'Harvest Now, Decrypt Later' attacks, where encrypted data is being stored by malicious actors for future decryption. In the more immediate term, markets are reacting to geopolitical tensions, with major cryptocurrencies experiencing a downturn. However, analysis from Charmaine Tam of Hex Trust suggests that Ethereum's (ETH) recent outperformance against Bitcoin (BTC) may signal a capital shift into altcoins, driven by institutional interest in spot ETH ETFs and emerging sectors like DeFi and Layer 2s. On the regulatory front, the Monetary Authority of Singapore (MAS) is tightening its grip on offshore crypto firms, a move potentially influenced by the collapses of Singapore-domiciled Three Arrows Capital and Terraform Labs. In response to the quantum threat, new solutions like Quranium's quantum-safe QSafe Wallet are emerging.

According to @AltcoinGordon, the cryptocurrency market faces a dual scenario of a long-term existential threat and a short-term trading opportunity. The primary threat is 'Q-Day,' the point where quantum computers can break current cryptographic standards, jeopardizing Bitcoin (BTC) and Ethereum (ETH). Experts like Jay Gambetta of IBM Quantum warn that malicious actors are already engaging in 'Harvest Now, Decrypt Later' attacks, storing encrypted data to break in the future. This risk is so significant that BlackRock added quantum computing as a critical risk to its Bitcoin ETF filing, and researchers estimate 4 million BTC could be vulnerable. In response, Ethereum's Vitalik Buterin has proposed emergency hard-fork solutions. Concurrently, the market is experiencing a 'summer lull' with Bitcoin's volatility trending lower despite trading at new highs over $100,000, as noted by NYDIG Research. This low-volatility environment makes options trading relatively inexpensive. NYDIG suggests this presents a cost-effective opportunity for traders to use calls for upside exposure and puts for downside protection to position for directional moves ahead of anticipated market-moving events.

According to @phantom, the crypto market faces an existential threat from quantum computing, known as 'Q-Day,' which could render current encryption obsolete. The risk is immediate due to 'Harvest Now, Decrypt Later' attacks, where malicious actors are already storing encrypted data from blockchains to crack later, a warning echoed by Jay Gambetta of IBM Quantum. This threat has prompted major financial players like BlackRock to include quantum computing as a critical risk in its Bitcoin ETF filing, noting it could undermine the viability of cryptographic algorithms. Researchers warn that as much as 4 million Bitcoin (BTC), or 25% of the usable supply, is vulnerable to theft, which could trigger a catastrophic price collapse. For Ethereum (ETH), co-founder Vitalik Buterin has proposed emergency hard-forks, but an upgrade to post-quantum cryptography could lead to extensive network downtime—potentially 75 days for Bitcoin, according to University of Kent researchers. For traders, this implies that any digital assets not secured by post-quantum cryptography could eventually become worthless, making the migration to quantum-resistant technology a critical factor for long-term portfolio viability.

According to @AltcoinGordon, the cryptocurrency market faces a significant long-term threat from quantum computing, with researchers warning that 4 million Bitcoin (BTC), or about 25% of the usable supply, could be stolen once quantum computers can break current encryption. This risk is underscored by BlackRock's unprecedented move to add quantum computing as a critical risk in its Bitcoin ETF filing. The text highlights that malicious actors are already engaging in "Harvest Now, Decrypt Later" attacks. In response to this existential threat, Ethereum (ETH) co-founder Vitalik Buterin has proposed emergency hard-fork solutions. On the development front, the Botanix Bitcoin Layer-2 and the XRP Ledger EVM-sidechain have both launched on mainnet, aiming to increase programmability and interoperability for BTC and XRP respectively. Further bridging the gap with traditional finance, Robinhood is launching an Arbitrum-based Layer-2 for tokenized assets, while Deutsche Bank plans a crypto custody service for next year. However, regulatory uncertainty persists in the U.S. as a crypto tax clarification proposal failed to pass and the New York Attorney General has warned against rushing stablecoin legislation.

According to @AltcoinGordon, institutional trading demand is driving Ethereum (ETH) to outperform Bitcoin (BTC), with ETH perpetual futures volume on OKX reaching 45.2% compared to BTC's 38.1%, making a $3,000 ETH price target increasingly likely as stated by OKX CCO Lennix Lai. Simultaneously, a Glassnode report indicates that institutions are actively accumulating BTC during price dips, a trend considered highly atypical for late-stage bull markets. The broader market is also seeing a surge in liquidity, with the stablecoin market hitting a $228 billion all-time high per CryptoQuant, and Tron benefiting most with over $6 billion in net inflows in May, according to Presto Research. However, a significant long-term threat looms as quantum computing, or "Q-Day," poses a risk to the entire crypto ecosystem. BlackRock has officially listed quantum computing as a critical risk in its Bitcoin ETF filing, with researchers warning that up to 4 million BTC could be vulnerable. IBM's Jay Gambetta warns the threat is already here due to "Harvest Now, Decrypt Later" attacks. This risk has prompted Ethereum's Vitalik Buterin to propose emergency hard-fork solutions, while experts like QRL's Iain Wood stress that all blockchains must become post-quantum secure to survive.

According to @AltcoinGordon, a constructive outlook for Bitcoin (BTC) is emerging for the second half of the year, driven by improving macroeconomic conditions and clearer regulations. A Coinbase Research report cited in the analysis highlights stronger U.S. growth, with the Atlanta Fed’s GDPNow tracker at 3.8%, and progress on crypto bills like the GENIUS and CLARITY Acts as key tailwinds. However, this optimism is contrasted by the existential threat of 'Q-Day'—the point at which quantum computers can break current blockchain encryption. The analysis warns of 'Harvest Now, Decrypt Later' attacks already being in progress. Notably, BlackRock reportedly added quantum computing as a critical risk to its Bitcoin ETF filing in May 2025, while researchers estimate 4 million BTC could be vulnerable. Ethereum (ETH) co-founder Vitalik Buterin has also proposed emergency hard-forks to address the threat. While BTC trades around $108,080 based on provided data, the long-term viability of crypto assets hinges on migrating to post-quantum cryptography to avert a potential collapse of digital trust.

According to @CryptoMichNL, the cryptocurrency market faces a significant threat from quantum computing, with researchers warning that 4 million Bitcoin (BTC), or about 25% of the usable supply, could be stolen once quantum computers can break current encryption. The source highlights that BlackRock has added quantum computing as a critical risk in its Bitcoin ETF filing. The threat, known as "Harvest Now, Decrypt Later," involves malicious actors collecting encrypted data today to decrypt in the future, a concern voiced by IBM Quantum's Jay Gambetta. For Ethereum (ETH), co-founder Vitalik Buterin has proposed emergency hard-forks as a potential solution. In other major developments, Polygon (MATIC) is undergoing a strategic overhaul, with co-founder Sandeep Nailwal taking over as CEO to focus on the AggLayer cross-chain protocol while retiring the zkEVM. Additionally, the Ethereum Foundation has established a new treasury policy, capping annual operational expenses at 15% to ensure long-term sustainability, and Bitcoin Core is set to increase its OP_RETURN data limit, which could affect on-chain data storage.

According to @AltcoinGordon, the cryptocurrency market faces a significant long-term threat from quantum computing, dubbed 'Q-Day,' which could render current encryption methods obsolete. Experts warn this is a present crisis, not a future problem, due to 'Harvest Now, Decrypt Later' attacks where encrypted data is being collected today for future decryption by quantum computers, as noted by Jay Gambetta of IBM Quantum. The risk is so significant that BlackRock added quantum computing as a critical risk factor in its Bitcoin ETF filing. Researchers estimate that 4 million Bitcoin (BTC), or about 25% of the usable supply, could be stolen once quantum computers are powerful enough. In response, Ethereum (ETH) co-founder Vitalik Buterin has proposed emergency hard-fork solutions, which could involve significant downtime. Meanwhile, the ecosystem continues to evolve with the launch of the Botanix mainnet, a Bitcoin Layer-2 designed to slash block times, and the mainnet launch of the XRP Ledger's EVM sidechain, aiming to enhance interoperability for dapps in the XRP ecosystem.

According to @AltcoinGordon, the cryptocurrency market faces a dual crisis of security and identity. A primary trading risk is the imminent threat of quantum computing, or "Q-Day," which could break the encryption securing assets like Bitcoin (BTC) and Ethereum (ETH). This risk is underscored by BlackRock adding a quantum computing warning to its Bitcoin ETF filing and research suggesting 4 million BTC are vulnerable to theft. The analysis highlights that nation-states are already engaging in "Harvest Now, Decrypt Later" attacks, making the threat immediate. Ethereum co-founder Vitalik Buterin has proposed emergency hard forks to address this vulnerability. Simultaneously, the author argues that crypto's core cypherpunk principles are being diluted as major entities like Coinbase and Ripple engage in political lobbying and alignment, moving away from the decentralized ethos that originally defined the industry and creating long-term uncertainty for investors.

According to @AltcoinGordon, the cryptocurrency market faces an imminent and catastrophic threat from quantum computing, known as 'Q-Day'. The analysis highlights the immediate danger of 'Harvest Now, Decrypt Later' attacks, where encrypted blockchain data is currently being stolen for future decryption by quantum computers, a risk emphasized by IBM Quantum's Jay Gambetta. For traders, this presents a significant long-term risk to asset security. BlackRock has officially recognized this by adding quantum computing as a critical risk in its Bitcoin (BTC) ETF filing. Furthermore, researchers warn that approximately 4 million BTC, or 25% of the usable supply, could be stolen once quantum computers can break current encryption. The risk extends to Ethereum (ETH), for which co-founder Vitalik Buterin has already proposed emergency hard-fork solutions to migrate to a quantum-resistant chain. The analysis also points to the severe market disruption a necessary upgrade would cause, with researchers at the University of Kent estimating a potential 75-day downtime for the Bitcoin network to implement post-quantum cryptography.