Brazilian crypto exchange Mercado Bitcoin suffers security breach, suspends deposit and withdrawal services

Mercado Bitcoin, one of Brazil's largest cryptocurrency exchanges, disclosed a security incident involving internal systems detected in the early hours of November 2, prompting the platform to suspend deposits and withdrawals as a precautionary measure. The exchange stated that no customer assets were lost and no data breach occurred, though it provided no further details on the nature of the breach. The incident comes as Mercado Bitcoin has been expanding internationally and reportedly weighing a US listing, raising the stakes for operational credibility. The company said its teams are investigating the root cause, tracing affected assets, and coordinating with regulators, with service resumption timelines not yet announced. Traders should watch for updates on whether trading remains unaffected, the scope of the internal systems compromised, and when deposit and withdrawal functions will be restored.