A cryptocurrency user has lost nearly $50 million USDT after falling victim to a similar-character address 'poisoning' attack. Initially, the user sent a small test transaction to the correct address. However, a subsequent transaction was mistakenly sent to a malicious address that closely resembled the intended one, copied from the transaction history. The malicious address was 0xBaFF2F13638C04B10F8119760B2D2aE86b08f8b5, while the intended address was 0xbaf4b1aF7E3B560d937DA0458514552B6495F8b5. This incident underscores the importance of vigilance in cryptocurrency transactions, especially with the increasing transaction volumes in altcoins.