The word "reserve" can function as both a verb and a noun, with meanings related to setting aside or keeping something for future use, or for a specific purpose. As a verb, it means to arrange for something to be kept or set aside, like a table at a restaurant. As a noun, it can refer to something that is kept for later use, an area set aside for a specific purpose, or even a state of being reserved in personality. Link
Reserve is a habit of a wise person.
They understand that surplus cannot be available all the time, hence the need to have a reserve for future needs and expectations.
That's why you have nations of the world having reserve and also their apex bank ensuring reserves are kept in the commercial banks. Reserve is important and it can be a life saver. It has been a saver for me in time past, and I am sure to keep up the habit of keeping reserve. You should too.
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