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Odaily News: Hardware wallet Coldcard has suffered a hack, with no confirmed total loss amount yet. Blockchain analytics platform CryptoQuant has confirmed losses of 1,432 BTC, while Galaxy Research places a high-confidence minimum estimate at 1,730 BTC. Other analyses suggest the scale of losses could be even higher. Research firm Galaxy Research stated that its earlier estimate of 1,816 BTC represents a potential figure, not a confirmed total. As of Tuesday, the firm's confirmed high-confidence minimum loss stands at 1,730 BTC, with over 450 BTC directly confirmed based on victim reports. Blockchain intelligence firm TRM Labs estimates that the attacker moved approximately 1,816 BTC from more than 5,200 addresses in four phases. CryptoQuant stated that its confirmed figures only include addresses publicly disclosed by victims and verified through on-chain patterns, meaning the tally could rise as more victims come forward with information. (Cointelegraph)
as the suspected hacking incident involving Coldcard wallets continues to unfold, Bitcoin small-value transfers have surged significantly, reaching their highest level since the FTX exchange collapse, reigniting market discussions on Bitcoin self-custody security.Julio Moreno, Head of Research at CryptoQuant, disclosed data on X platform showing that the number of on-chain Bitcoin transfers below 1 BTC has risen to its highest level since November 2022, with approximately 39,600 BTC transferred in a single day—only about 300 BTC below the record of 39,900 BTC set on November 16, 2022, just days after FTX filed for bankruptcy. He believes that users proactively taking action to address risks is a positive signal. Additionally, Eric Balchunas, Senior ETF Analyst at Bloomberg, noted that Bitcoin ETFs, backed by a mature regulatory framework and convenience, may offer some users a safer investment approach.However, industry insiders point out that the Coldcard incident more likely reflects issues with a single wallet provider or specific security processes, rather than indicating a failure of the entire Bitcoin self-custody system. This event once again highlights the importance of security awareness, risk diversification, and wallet usage habits in personal asset management.
According to CryptoQuant Head of Research Julio Moreno (@jjcmoreno), following the hack of Coldcard hardware wallets, users transferred Bitcoin on a large scale due to security concerns. On-chain data shows that Bitcoin daily active addresses surged from 645,000 on July 30 to nearly 1 million on July 31, marking the highest single-day level since December 10, 2024, with active sending addresses rising significantly while receiving addresses saw relatively limited growth. Meanwhile, daily exchange deposit volume for single transactions under 10 BTC soared to 7,300 BTC, the highest since February 6 this year.