Do you think I should throw away my bully's business cards?
Why would you throw away your bully's card?
He gave me a job once and I no longer work there.
You cannot be expected to keep so many business cards in your wallet that you will not need. Nobody wants or should have to work for someone who bullied them.
I don't want to do things for him. He is a huge jerk.
Good on you for standing up to your bully! You didn't deserve all that treatment, and throwing away this business card would be the last tie you have with him so you can move on.