Do you pay attention to your dreams or believe in dream interpretation?

I had an awful dream. In the dream I'm in Boston at the airport and my friends are seeing me off. I go to use the rest room. I'm in the stall, the guy in the next stall says he needs toilet paper so I turn, reach over and give him a roll of toilet paper. As I'm giving him the tp someone reaches over the other side of my stall and takes my carry-on. I quickly leave the stall, look out the restroom window and see my friend Mark running off with my carry-on in the distance.

This dream has me scared because I don't know why I would have such a dream. I guess in dream interpretation I should not trust my friend Mark? I've known Mark for 8 years and never had any problem with him. Incidentally, in the dream, Mark isn't one of the friends seeing me off at the airport, he just appears when my carry-on is stolen.