Mercado Bitcoin has restored read-only access; the withdrawal timeline remains uncertain. Approximately $49 million was stolen earlier. Officials say most assets are safe, and some funds have been frozen. Security analysis: ordinary transfers were involved, not a smart contract vulnerability; how wallet permissions were leaked remains unclear. Users must verify their information before withdrawing. Pix is expected to open first, limited to accounts in the user's own name. #MercadoBitcoin #加密安全 #Hacker attack