It depends on the environment, but most quality folders will be a help in a survival situation, The big trick is to have it with you when something disasterous happens. So search in the range of knifes you like to EDC. This is the way to realy have it when needed. No need to have a knife so big its difficult to use among people.
For me a Delica is sturdy enough. I have used mine while moosehunting, mountaincamping, construktion work, foodpreparation, making campfire, to name a few areas it has worked. Its able to hold its VG-10 edge for a while and its possible to field sharpen and its light to carry and friendly enough to use almost everywere.
Bosse