According to CoinMeta, a recent report indicates that cold card hardware wallets have a firmware vulnerability that allowed attackers to steal approximately 1,082 Bitcoins from over 1,100 Bitcoin addresses, worth about 70 million US dollars. This vulnerability serves as a reminder to investors that self-storing assets depends not only on offline storage but also on robust key generation. Experts suggest that investors should avoid relying solely on a single hardware wallet ecosystem and adopt multiple independent storage solutions to reduce the potential losses caused by software defects.