I agree with Blu. It's worth keeping.
Of course that is coming from a life long packrat.

I will say this, I had an uncle who went through
D-Day and all of WWII. He never talked about it.
As many who has been thourgh combact it was
his only way to deal with it. My aunt did not
think anyone in the family would want his old
uniforms so she gave them to Goodwill.
I did not find out very much about his service until after his death.
I would pay dearly to have something of his now that
he is gone.

Your hat my friend is a heirloom.