System Barter system- people using goods & services to exchange to exchange another goods & services in return during the ancient times, where there is no fiat money.
Which many people find it unfair as it is difficult to determine each goods & services values and there are unlimited of items to exchange.
Gold system – Gold as currency as there limited amount of gold. However, it is very difficult to execute transactions as it is heavy to carry around especially a large distance.
Paper Money- People had faith into the fiat money, so there is value into the paper money hence it is applicable to make transactions. However, government printing money time to time, which it causes inflations and depreciation in fiat money.
The advancement of technology is inevitable. It creates massive amount of conviniency in every ecosystem that is created.