I don't wear an Elph on a neckstrap because... well, because that's just not a look I care to cultivate.
However, you might want to keep a 35mm disposable camera (800 speed film, with flash) in your car's glove compartment. If ever you're in an automobile accident, take pictures of the scene, all people involved, license plates, the cars - particularly where there's any visible damage, skid marks leading up to the point of collision, etc.
Yes, if things ultimately get all unpleasant and legal-like, these photos can help you. A lot. Trust me. I know what I'm talking about.
Heat tends to age film quickly, but even after sitting in a glove compartment all summer long, you'll still get usable images. They won't be great pictures, because we're talking about a camera that has a fixed-focus plastic lens, cardboard construction, and costs $5.99 on the checkout line at Walmart. Cheap enough that you can probably afford to throw away the camera every 6 months, and replace it with a fresh one.
Plus, if you see a UFO, you'll be able to snap the obligatory blurry picture.