||The most abundant item in Tibia as hundreds of thousands of these are looted every day. For more information, read Currency and List of Creatures That Drop Gold Coins. Often abbreviated to "GP" when talking in game, such as "100 gp." For larger amounts it is often seen as 1k for 1,000 gold coins or 1kk for 1,000,000 gold coins. 1,000,000 gold pieces can also be written as 1M (one million, but not commonly used).
It's not commonly known that the "money letters" used in Tibia are actually prefixes from the metric system.
'K' stands for 'kilo', which comes from the Greek word 'χίλιοι' (thousand).
'M' stands for 'mega', which comes from the Greek word 'μέγας' (great).