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 @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, 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 @rovercrc, the cryptocurrency market faces a dual challenge from the imminent threat of quantum computing and the current slow adoption by institutional players. The author highlights that 'Q-Day,' when quantum computers could break current encryption, poses a significant risk to Bitcoin (BTC) and Ethereum (ETH), citing warnings from IBM's Jay Gambetta about 'Harvest Now, Decrypt Later' attacks and a prediction from Tilo Kunz of Quantum Defen5e that this could occur as soon as 2025. The analysis points out that approximately 4 million BTC are vulnerable, and Ethereum co-founder Vitalik Buterin has already proposed emergency hard forks. Concurrently, the author references insights from Gerry O’Shea of Hashdex, who notes that the majority of financial advisors are not yet recommending crypto due to volatility concerns. However, O’Shea predicts this hesitation will fade and identifies stablecoins as a key 2025 theme, potentially driving value for underlying platforms like Ethereum (ETH) and Solana (SOL).

According to @QCompounding, the cryptocurrency market faces an imminent existential threat from quantum computing, termed 'Q-Day,' which could render current encryption methods for assets like Bitcoin (BTC) and Ethereum (ETH) obsolete. The analysis highlights a warning from researchers that 4 million BTC, or about 25% of the usable supply, are vulnerable to theft once quantum computers become sufficiently powerful. This risk is amplified by 'Harvest Now, Decrypt Later' attacks, where encrypted data is being collected today for future decryption, a threat underscored by IBM Quantum's Jay Gambetta. Notably, BlackRock has added quantum computing as a critical risk factor in its Bitcoin ETF filing. While some experts project Q-Day is five to seven years away, sources like Tilo Kunz suggest it could arrive as soon as 2025. The proposed solution, migrating to post-quantum cryptography, presents its own trading risks, with estimates suggesting potential network downtime of 75 days for Bitcoin. In contrast, the analysis also points to the rapid growth of stablecoins, which are enabling a 'streaming economy' with near-instant, low-cost payments on Ethereum Layer 2 networks, potentially freeing up trillions in capital for investment. For traders, this presents a dual narrative: a catastrophic security risk versus a revolutionary shift in financial infrastructure.

According to @AltcoinGordon, the cryptocurrency market faces two critical threats that traders must monitor. The first is the imminent risk of 'Q-Day,' where quantum computers could break current encryption, with experts like Tilo Kunz of Quantum Defen5e cited as suggesting this could happen as soon as 2025. This poses a direct threat to major assets, as BlackRock has officially listed quantum computing as a critical risk in its Bitcoin ETF filing. The analysis highlights that an estimated 4 million Bitcoin (BTC) are vulnerable, and Ethereum (ETH) co-founder Vitalik Buterin has proposed emergency hard forks that could halt the network for years. The second threat comes from 'Ponzi VCs' whose funding models prioritize rapid, predatory exits over sustainable product development. These VCs often secure token unlocks within one to two years, enabling them to dump on retail investors long before a project proves its value. This practice is drawing increased regulatory scrutiny from bodies like the SEC and creating a market filled with 'zombie protocols,' posing significant risks for altcoin investors.

According to @AltcoinGordon, the cryptocurrency market faces a catastrophic threat from quantum computing, known as 'Q-Day,' which could shatter the encryption securing assets like Bitcoin (BTC) and Ethereum (ETH). The analysis highlights that BlackRock has added quantum computing as a critical risk in its Bitcoin ETF filing, warning it could 'undermine the viability' of cryptographic algorithms. Researchers cited in the text warn that approximately 4 million BTC, or 25% of the usable supply, are vulnerable to theft once quantum computers become powerful enough. Furthermore, Ethereum co-founder Vitalik Buterin has reportedly proposed emergency hard-fork solutions, which could involve significant network downtime. The author points to experts like Tilo Kunz of Quantum Defen5e, who suggested Q-Day could arrive as soon as 2025, emphasizing the immediate danger of 'Harvest Now, Decrypt Later' attacks. This technological risk is compounded by what the author describes as an erosion of crypto's original cypherpunk values, as major entities like Coinbase and Ripple increasingly align with the centralized political and financial structures they were meant to challenge.

According to @GoogleDeepMind, the cryptocurrency market faces an imminent threat from quantum computing, with malicious actors already engaging in 'Harvest Now, Decrypt Later' attacks. Jay Gambetta, Vice President of IBM Quantum, warns that nation-states are currently harvesting encrypted data with the intent to decrypt it once quantum computers are powerful enough. This poses a significant risk to the entire crypto ecosystem, as researchers warn that approximately 4 million bitcoin (BTC), or 25% of the usable supply, could be stolen. This risk was highlighted in BlackRock's Bitcoin ETF filing, which cited quantum advances as a potential threat to cryptographic viability. For Ethereum (ETH), co-founder Vitalik Buterin has proposed emergency hard-fork solutions to counter the threat. A December 2023 Reuters report suggests that cryptographically relevant quantum computers could emerge as soon as 2025. While the market faces this long-term risk, key ecosystem developments are unfolding. According to the source, Polygon (MATIC) co-founder Sandeep Nailwal has taken control as CEO of the Polygon Foundation, pivoting the project's focus to its AggLayer cross-chain liquidity protocol and retiring the zkEVM. Additionally, the Ethereum Foundation has implemented a new treasury policy capping annual operational expenses at 15% of its holdings, and Bitcoin Core developers plan to increase the OP_RETURN data limit in the upcoming version 30 release.

According to Francisco Rodrigues, Bitcoin (BTC) is trading near $106,000, buoyed by reduced geopolitical risks after President Trump delayed a decision on U.S. entry into the Israel-Iran conflict, as per Polymarket odds shifting from 70% to 40% for immediate action. However, CryptoQuant analysts warn that BTC could drop to $92,000 if demand fails to rebound, citing a 60% decline in ETF flows since April and halved whale buying activity. Glassnode notes subdued on-chain activity reflecting institutional dominance, while derivatives data from Velo shows $131.89 million in liquidations skewed toward shorts, with BTC dominance at 65%.

According to The Kobeissi Letter, the 10-year US Treasury yield, which had been steadily declining before April 2nd's announcement of reciprocal tariffs, reversed course as basis trades unwound amid rising volatility. The yield surged past 4.50%, now sitting above that key level (source: The Kobeissi Letter, May 21, 2025). This sharp increase in yields signals tighter financial conditions, which historically pressures risk assets like Bitcoin and altcoins. Crypto traders should monitor US bond market volatility closely, as sustained high yields may drive further outflows from digital assets and increase market risk.