The following sentence appeared in an article: "I would say 94,504 bitcoins is real folding money, but you can't fold bitcoins." A colleague said that it should have been 'are' instead of 'is.' I am torn as to whether he is correct because 'bitcoins' is plural or incorrect because '94,504 bitcoins' is a singular concept that is being equated to another singular idiom.
I think he's incorrect because 'five eggs is enough' is correct and you rarely equate a plural noun with a singular noun; 'apples are orange' doesn't work.