Recent cybersecurity incidents have targeted cryptocurrency users through data breaches and phishing attacks. A Coinbase data breach has led to victims receiving scam mail, including fake postal letters claiming to offer credit protection services related to the breach. Users are advised to remain vigilant against requests for cash or cryptocurrency and to report scams to relevant authorities. Additionally, a phishing attack on the Hyperliquid platform has compromised over 1,200 addresses in the past 60 days. This attack involves a single malicious signature that upgrades an externally owned account (EOA) to a one-of-one multisignature wallet controlled solely by the attacker, granting full access to the victim's assets. Users of Hyperliquid and HyperEVM are urged to verify their account signatures carefully to avoid unauthorized asset transfers. These developments highlight ongoing risks in the cryptocurrency ecosystem from increasingly sophisticated scams and phishing techniques.