To share or not to share?

Hello my CIPD Community members,

I need some feedback on a recent occurrence. My department was asked to do a Presentation and my boss threw it at me. I decided to do a Power Point presentation to make it engaging, which I was highly commended for.

I am now being asked to put my hard work on a shared drive so others can have access to it.

I feel like this is my work, my pride and joy, my pet and I don't really want to since I don't believe others will do it justice.

Any advice here?