So after reading the story I realized that someone targeted you because he didn't transfer the funds even after looking into your $7k wallet. He knew that you have a large amount of funds and that you will use this wallet again to make transactions.
This is exactly what I wanted to say.
If the hacker had previous access to his wallet, why he didn't steal those $7k? It doesn't make sense. The only explanation is that the hacker didn't have access to the wallet at that moment.
Saying that he was expecting such large deposit doesn't make sense, unless it's someone clise to OP who knew he will receive this large amount if money and was waiting for the right moment to empty the wallet. This is why we need more information from OP to understand what've happened.