I don't want to share my chips
Why do you think you should be selfish with your chips?
I just want to have a snack without sharing them with anyone. I'm a stingy man.
Not sharing leads to other people feeling unhappy and uncomfortable with you. When we share with others, we create a relationship of trust, which flows back and helps us feel secure and happy.
I don't give a shit about them and I'm still going to keep all my food.
You can still enjoy your food and give a bit to others are well. Ultimately they're your chips, but I would hope you'd be kind to others when you let them know that you are keeping all the chips for yourself.