Because I don't want it to get wet!
No, seriously, these Pelican cases are nearly indestructable, and keep my canmera clean, dry and ready whenever I need it. I also keep my cell phone and Swarovsky binoculars in separate Pelican cases whenever I'm in my driftboat. They are an extra weight that I probably wouldn't want to lug around if I'm wakling and wading, but the extra weight is more that offset by peace of mind when I have these items in my boat. Plus, the case is virtually soundproof, so no one is distracted if my phone should happen to ring.
John