On where you live, I guess. I use a nice bike for commuting because it's the only bike I have right now and I like to be comfortable even when commuting. You could get a crappy bike to ride and be safe and in pain, or not. If you have some place indoors near you that you can store it go for it. If not, don't. I can't stand seeing those guys rolling shopping carts of nice bikes down the road that you know they ripped off at a college campus bike rack...