A camera is a tool and a Leica is a nice tactile tool to work with. I have never thought of owning one as an investment, but I know collectors buy them and put them in cabinets. I suppose I am a collector’s nightmare, as I actually use them and they get dented and worn.
No, collectors love people like you, because it means fewer in top cosmetic condition!
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.