Before paper money and coins made of cheap metals like nickel, currency consisted of coins made of precious metals like gold and silver. These were the most sought after metals of the time, giving them value beyond government decree. Debasement was a common practice to save on precious metals and use them in a mix of lower-value metals instead. This practice of mixing the precious metals with a lower-quality metal means authorities could create additional coins with the same face value, expanding the money supply for a fraction of the cost compared to coins with more gold and silver content. Today, coins and notes don't have inherent worth, they are simply tokens that represent value. This means debasement relies on supply: i.e. how many coins or notes the issuing body allows to circulate. Debasement went through different processes and methods over time; therefore, we can define old and new methods.