Why do people collect coins and stamp?
Experienced coin collectors do collect sets in one way or another. Some go with date and mint mark, others maybe varieties, of say maybe one year or type of coin. Some go for a certain theme say ships. When first starting out few know what they may really find interesting so go for it all. In the end they will find something they like and go for it or stop collecting. Also a true numismatist studies what coins he collects. As time goes by he may go from one thing to another. The more one learns about coins the better the chance he will get into some that are more complicated to collect. The reason people these days get into all kinds of accumulations is they are trying to make a fast buck and few do. It is the quality coins I bought 40 years ago that have gone way up in value. I have them because I like them not because back then, I thought they would make me money. There are 3 rules to follow, do not get caught up in Fads, buy the highest grade you can afford in the series you pick to