Mercado Bitcoin has paused deposits and withdrawals after roughly $40 million was drained from its wallets across at least 10 separate blockchain networks. The Brazilian exchange confirmed the freeze but hasn't said when transfers will resume. The timing is rough: the drain comes just days after the $6.3 billion Binance hack, an incident still being sorted out.
The freeze order
Deposits and withdrawals stopped, but there's no word yet on whether trading on the platform is affected. Mercado Bitcoin hasn't disclosed which networks were hit, how the attackers got in, or whether any of the stolen funds have been traced. The exchange is describing the pause as a protective measure, though it hasn't offered a timeline for lifting it.
For users, the practical effect is simple and unpleasant. Coins already on the exchange can't move out. Coins sitting elsewhere can't move in. Whether balances remain intact for trading is a separate question the exchange hasn't addressed publicly.
Ten chains, one exchange
The spread of the drain is the detail that stands out. Ten or more networks means this wasn't a single hot-wallet compromise. Either the attackers worked across multiple custody setups, or Mercado Bitcoin's wallet architecture shares a common weakness that let them move laterally. The exchange hasn't characterized which scenario it's dealing with.
Brazil's crypto market has grown into one of the larger retail hubs in the region, and Mercado Bitcoin is among its best-known venues. A drain of this size, spread this widely, will draw scrutiny from local regulators even before the forensic work is done.
Coming right after Binance
Two major incidents inside the same week is the sort of run that makes an exchange's incident-response plan get tested for real. The Binance hack, at $6.3 billion, is orders of magnitude larger, but that doesn't make Mercado Bitcoin's $40 million a footnote. It's the second breach headline in days, and users on both platforms are watching to see how each responds.
There's no indication the two events are connected. The facts so far don't point to a shared attacker, a shared tool, or a shared wallet provider. They're separate incidents that happened to land close together, which is its own kind of bad luck for the market.
What users are waiting on
Mercado Bitcoin hasn't published a post-mortem, a recovery plan, or a date for restoring withdrawals. Until it does, customers are stuck watching a frozen balance. The exchange's next public statement — whenever it comes — will be the first real signal of whether this was contained or whether more wallets are exposed.
For now, the only confirmed facts are the pause and the $40 million figure. Everything else, including how the attackers got in and whether any funds are recoverable, is still open. That's the part worth watching.
