If you think as crypto as languages, there is one island that has 860 different languages. Also many countries have their own currency. The internet is worldwide and you can even say beyond that (space) (not sure if that is the world or Earth or Universe for description information) but would you rather have just one master currency and language or many different ones? If there is one master currency, that is considered easiest to manipulate everyone. Best to have several different ones.
We don't NEED this many coins but it's always fun to have a few.
