When you deposit $200 in your savings account with the objective of withdrawing it later to buy a video game that is about to be offered in the market in the near future, then the $200 is serving which function?

serve as store of value

Explanation:

The four main functions of money are:

it serves as a unit of account: it provides a common measure of the value of goods and services being exchanged. it serves as a store of value: money holds its value over time, so it serves as a store of value. it serves as a medium of exchange: you can use money to purchase goods and services it serves as a standard of deferred payment: money serves as a way of valuing a debt, so you can acquire goods now and pay for them later.