Scripophily
It is called scripophily.
The study and collection of stocks and bonds in the USA is typically referred to as finance or investment management. This field encompasses activities such as analyzing financial markets, making investment decisions, and managing portfolios to achieve financial goals.
The collection and/or study of coins is called Numismatics.
At collection of stamps is refered to as a stamp collection. They are frequently kept in albums. Philately is the name for the study and collection of stamps.
The collection and study of money (coins, in particular) is called numismatics or numismatology.
Collection of coins is called collection of cons only n there is no specific word for it. It is different from numismatics as numismatics is the systematic study of coins. Mere collection of coins cannot be called as numismatics.
Observation and collection of data.
The process is called data collection. It involves gathering information from various sources, such as surveys, interviews, observations, or existing data sets, to study and analyze in order to answer research questions or test hypotheses.
The collection and study of insects is called entomology, and those who specialise in the collection and study of butterflies are termed lepidopterists. Entomologists are usually professional scholars who specialise in the subject, whereas the term lepidopterist can be used to describe a professional or amateur butterfly collector.
The study of the energy transformations that occur in a collection of matter is calledThermodynamics.
The study or collection of currency is called Numismatics. This includes paper money, tokens or coins. This term can also include the study of money in general.