If just printing big notes was the mark of a rich country, Zimbabwe would be the richest country in the world now. Currency notes / coins can only be introduced based on the actual currency reserves, and not randomly. If a country does intend to mint more currency than it actually has, the value of that currency goes down.
To give a very basic example - and not entirely covering all the intricacies - let's say a country has reserves of 1000 units. Let's assume that those 1000 units can get you 1 kg of gold in the international market. Therefore, 1 unit can get you 1 gram of gold. Now the country goes ahead and prints currency worth 2000 units. However, since they don't actually have that amount of money, those 2000 units end up being nothing but a representation of those 1000 units it actually has. Which means, to get the same 1kg gold, one has to shell out 2000 units of the currency, effectively meaning, 1 unit can now only get you 0.5 grams. So the value of the currency has come down, without changing anything else