I bet you'll find that once you have a necker on a lot, it will get used more than you expect. Sure, it may not be as a last ditch knife, but it'll see more use as a box opener then you can imagine
-d
OH yes! I currently wear a crkt ringer and sometimes I even wear my BM nim cub. I am fully comfortable wearing a neck knife during regular tasks but, for example, if I running and I take off my shirt I don't want a knife flopping around because ONE- it hurts when it smacks your chest and TWO- it looks ridiculous to the general public. My knife idea isn't much bigger than a dog tag.
Well, I figured it was a last ditch type affair.
A Poke some bastard mugger a bunch of times and run type deal.
G10 would work fine for such an application, and weigh almost nothing, and never rust...
If you want to actually have a useful knife, then use steel.
I do like the fact that it wouldn't weigh much and would NEVER rust but IF I am forced to use for survival I'd rather have a steel blade then a G10 one.