Extortion: Hackers use ransomware or other ways to lock you out of your own files and systems. They then demand payment in order to unlock everything.
Targeting your clients: Hackers will hack you to get to your clients. All they have to do is steal your client email lists or other records to act like you to them.
Business finances: Once hackers get into your network they can easily find out how to get into your bank then transfer large sums of money to themselves.
Social Engineering: Hackers can use publicly available information along with information they find on the inside of your computers to target you or companies/people you work with.