I personally don't see the need to wear a camera all the time but if you're in an area with lots of bad drivers or lots of traffic where incidents between you and a driver can arise, I can see it making sense to have one. I've never really considered a camera BUT mounting it to your chest usually doesn't show a very good picture. Especially on a road bike, you may be in a tuck so it may not be pointing very far ahead and in either case, I would think you would get a narrow field of vision on it since your arms will be on either side if chest mounted. Helmet mounted would be the way to go I think.