Should I put a ground plug in this toaster?

I have a sunbeam radiant control toaster. It has a metal case and exposed elements with no ground plug.

I’ve read both that with out ground, the case could become energized and give you a nasty shock AND with ground, if you stick a knife in the toaster with your other hand on the case it’ll give you a fatal shock.

Everyone know not to stick knives sin toasters, but still. What do you guys think?