Cita: "Idolenz"Why though?
That's not how the English language works at least according to all websites and dictionaries I know/own.
Capitalisation is very common in numismatic catalogues - not only in Krause & Pick.
It also helps the currency units / denominations to stand out - especially from the compilation perspective.
I always start a currency unit / denomination with a capital letter - eg; Bruneian Dollar.
Currency codes are always capital letters - eg; Bruneian Dollar - is 'BND'.
Aidan.