Video Game Currency

1. Feature Currency

1.1. Social Currency

1.2. Event Currency

2. Premium Currency

2.1. Special Currencies

2.2. Special Items

2.3. Special Characters

2.4. Lootboxes

3. Common Currency

3.1. In-game money/resource

3.2. Energy

3.3. Items

4. Real Money

4.1. Source of gambling addiction

4.2. Source of revenue for developers