Is this potential roommate sketchy?

So, I'm just out of college, and I'm job hunting. I do have some money saved up from a part-time job, but not enough to afford a decent apartment on my own. A mutual friend introduced me to this guy, who is 23. My friend tells me he graduated from an Ivy but doesn't have any student loans (financial aid and part time job) and got recruited right out of college to work as an investment banker. I talked to him a couple times. He seems nice and friendly, but the first thing that jumped out at me is how rich he seemed. He was wearing a different suit each time I saw him, drive a pretty nice car, and had the latest iPhone. I know investment bankers make a lot, so I was wondering why he needed a roommate. He told me something about cutting costs so he can invest more in the stock market. That is a reasonable answer, but I still feel that it's kind of sketchy. Am I right to have that feeling?

Honestly ask his friends or talk with his family to find out. To me he seems pretty accomplished and successful so I would just room with him due to him not having student loans and having every new thing. Just find out about him and decide for yourself, if you feel he is untrustworthy then don't room with him.

Sounds fishy to me also. Go with your gut.