The amount of money in the economy is called the
money supply
demand for money
purchasing power of consumers

Money supply refers to the amount of money available in the economy. It can be in different forms like cash, coins, and balances that are usually held in different checking and savings accounts. It also refers to the entire stock that a country has available within its economy.

You don’t list any options but the one that frets overspending and the consequences of that.