Is currency capitalized?

Is currency capitalized in a sentence?

I ask because my story revolves around a created world with a created type of money. So for example:

You owe me two hundred gold Rowls.
or
You owe me two hundred gold rowls.

Just not sure, I think I know I just wanted to be sure. I recall reading a story where it as called Raq and I think it was always capitalized.

Thanks,
RyanM

 

Generally, currency is not capitalized, although abbreviations often are:

 

Yeah what cogito said. I mean you don't say "You owe me one hundred Dollars." You say, "You owe me one hundred dollars."

 

Not since the banks collapsed.