There's something to be said for collecting old coins. Some people do it for the fun of it or to have a cool story to tell.

Could you have a penny worth way more than one cent? Or a quarter worth a small fortune? A 1943 bronze Lincoln cent, a 1944 ...

Cryptocurrency is a digital or virtual coin secured by cryptography ... then cryptocurrency should be his cup of tea. Just a decade-old asset class, it has yielded astronomical returns over the years.