Mercado Bitcoin Is Reopening After a Cyberattack Froze Withdrawals for a Week. What Happens to Your Crypto When an Exchange Goes Dark?

Mercado Bitcoin, Brazil’s largest cryptocurrency exchange, announced it will partially reopen on November 9, 2026. This follows a cyberattack that forced the platform to halt withdrawals on November 2. In a video shared on X, Vice President Fabricio Tota explained that the initial phase will let customers check their balances and assets, but not move or trade them just yet.

From November 9, users will regain access to the website to view their account balances, transaction statements, and overall holdings. However, transfers, withdrawals, and trading will resume only in later phases, depending on the completion of independent security assessments. So while customers can see their cryptocurrencies, they won’t be able to move them for now.

The situation has drawn attention well beyond Brazil, with U.S. Google searches for “Mercado Bitcoin” up 250% in the week following the attack. Bitcoin (CRYPTO: BTC) trades at $75,720, showing little movement over the past 24 hours and down 2.3% over the week. So what happens to your cryptocurrency when an exchange goes dark?

What Mercado Bitcoin’s Reopening Covers and What It Still Locks

The cyberattack targeted Mercado Bitcoin’s hot wallets, the internet-connected wallets used for processing withdrawals, as well as customer deposit addresses. Blockchain security company Hypernative identified suspicious transactions across at least 10 different blockchains, although Mercado Bitcoin has declined to confirm that figure.

Mercado Bitcoin has committed to using its own funds to replace the affected assets. The exchange stated, “Our trading desk is preparing to begin the necessary repurchases in domestic and international markets.” It also highlighted a solid cash position, helped by an investment from stablecoin issuer Tether, which has frozen tokens tied to the attack. So the company that froze the stolen tokens is also an investor with a stake in Mercado Bitcoin’s survival.

While the freeze lasts, the crypto remains on the blockchain in wallets controlled by the exchange. Many exchanges use pooled wallets, meaning a single wallet holds cryptocurrencies for multiple users, while an internal ledger tracks individual ownership. That means a user’s balance is a claim on the exchange, not ownership of the actual coins.

That claim is safest when customer assets are segregated, legally separated from the exchange’s own so they can’t be used to pay off the firm’s debts. Brazil has written that separation into its rules. The Central Bank of Brazil’s Resolution BCB 520/2025 requires reviews of the segregation between a crypto provider’s own virtual assets and those owned by customers. Mercado Bitcoin’s handling of this incident may affect how regulators assess its licensing application.

How FTX, Celsius and Mt. Gox Freezes Ended for Customers

FTX customers faced a costly outcome. They were repaid in U.S. dollars based on crypto values at the time of the exchange’s bankruptcy filing in November 2022. That meant anyone who held Bitcoin with FTX was repaid at that much lower price, missing every rally that followed.

Celsius customers fared worse. A federal judge determined that users of Celsius’s “Earn” product had given up control of their coins, which then belonged to the bankruptcy pool that gets divided among all creditors.

Mt. Gox demonstrates the potential for lengthy waits. Its trustee has been repaying creditors in Bitcoin and Bitcoin Cash (CRYPTO: BCH), and the repayment deadline has been extended from October 31, 2026, to October 31, 2027.

Mercado Bitcoin’s update has not provided a timeline for when withdrawals will resume, nor has it offered a verified account of losses or a reserve check to confirm that available coins match customer balances. Until the exchange provides this information, its promise to cover losses cannot be independently verified.

Customers may want to review the exchange’s terms to see whether they retain ownership of their coins. Many individuals keep only a portion of their holdings on exchanges, using self-custody wallets where they control their private keys for the rest. From November 9, Mercado Bitcoin customers can also download their statements and take screenshots of their balances, which can serve as proof for future claims.

Unsolicited “recovery” offers deserve suspicion. The Mt. Gox trustee has received reports of fake websites posing as it, and scammers often exploit exchange incidents like this one to steal user credentials.

Does Mercado Bitcoin’s Freeze Move Bitcoin’s Price?

Mercado Bitcoin’s freeze hasn’t moved Bitcoin’s price much. Bitcoin’s decline started weeks earlier, with the coin down 7.3% over the last month and trading 39.9% below its all-time high of $126,080 from October 6, 2025. A larger shock came around the same time, when Binance users pulled their funds after a major heist. Mercado Bitcoin’s buybacks could add some buying pressure, but Bitcoin’s market value tops $1.5 trillion.

What Happens to Your Crypto When an Exchange Goes Dark?

The coins stay on the blockchain, but customers hold only a claim on the exchange until withdrawals reopen. Whether that claim is honored in full depends on segregation and on the exchange covering its losses, and FTX, Celsius, and Mt. Gox show the alternatives can mean dollars at old prices, a share of a bankruptcy pool, or years of waiting.

Mercado Bitcoin has a lot to prove as it reopens, and its next test comes when withdrawals resume. If customers report full balances, the episode probably ends as a contained exchange hack. If withdrawals stay shut past November or the exchange announces partial repayments, Brazilian holders could start pulling coins from other local platforms, and that would be the first sign this hack could reach Bitcoin’s price.

Contact [email protected] for any questions or corrections.