The collection and study of money (and coins in particular)(noun)
WordNet. Princeton University. 2010.
Use "coin collection" in a sentence
"He tried to run for the wolverine house, but the coin collection man and his pals — trawling in a car — found him."
"They drove him out to Sleepy Lagoon Park and beat him; the coin collection man wanted to castrate him, but his friends held him back."
"Within a few weeks of our arrival in Birmingham, David Junior packed his duffel bag and left for Auburn University, leaving his U.S. coin collection covered with old underwear in his dresser drawer."