Here is an example currency documentation:

Currency Documentation

Overview

This document covers the virtual currencies used in the game economy. Currencies are required to purchase items, upgrades, and services.

Gold Coins

• The standard currency earned from quests, monsters, and selling loot
• Used to purchase basic equipment, consumables, repairs, etc.
• Can be found as drops from enemies or treasure chests
• Amount held is displayed in the inventory UI

Gemstones

• Rare currencies found only in certain locations or from boss monsters
• Used to purchase and craft high end gear and rare items
• Different gemstone types have different rarities and values
• Stored in currency pouch, full list visible in currency tab of UI

Tokens

• Special currencies associated with certain factions, events, or vendors
• Earned and spent only at specific locations related to their source
• Used for unique rewards like mounts, cosmetics, recipes, etc
• Often time limited for duration of associated event or activity

Premium Currency

• Purchased with real money through in-game store
• Used to acquire vanity items, boosts, subscriptions, etc
• Cannot be earned through regular gameplay
• Provides revenue stream to support ongoing development

Currency Storage

• Regular currencies stored locally with character data
• Premium currency associated with user account
• Currencies persist through death but fraction can be dropped as loot
• Excess currency automatically deposited into account wallet

Let me know if you would like me to expand or modify anything here!