Mercado Bitcoin, Brazil's largest crypto exchange, confirmed on November 2 that it suffered a cyberattack and has suspended deposits and withdrawals. Blockchain security firm Hypernative's preliminary analysis estimates over $40 million in suspicious fund transfers across at least 10 blockchains, including Bitcoin, Ethereum, Solana, and Tron, though the exchange has not yet confirmed this loss. Tether has frozen over 4.5 million USDT. Mercado Bitcoin stated that the incident was quickly contained, customers will not incur losses, and no customer data was compromised.