Multiply x data by 100,000, and we have 100,000 times the potential knowledge within these life forms. That's the benefit of variety. Biodiversity is variety. Biodiversity is untapped wealth.
I'm... not quite sure you're using the concepts correctly. Each individual specimen is possible wealth, and areas that contain a diversity of species in a sustainable manner are quite literally areas with abundant natural/biological resources, but I don't think "biodiversity" is specifically the word to use here. All it really means is variety of life. So, in my mind, vast untapped resources can potentially become wealth. Whether they are varied or not doesn't really matter.
Obtaining that wealth in a sustainable manner is another entirely different matter, and really doesn't depend on whether capitalism or something else is involved.