The Lamonster
Member
"Lots of currencies can make things more complicated."The amount of "currencies" that will be in Destiny as of the first DLC (that we are aware of)
- Glimmer
 - Vanguard Marks
 - Crucible Marks
 - Weapons Parts
 - Hardonic Essence
 - Sapphire Wire
 - Plasteel Plating
 - Ascendant Shards
 - Ascendant Energies
 - Motes of Light
 - Strange Coins
 - Exotic Shards
 - Radiant Energies
 - Radiant Shards
 - Vanguard Reputation
 - Crucible Reputation
 - Dead Orbit Reputation
 - New Monarchy Reputation
 - Future War Cult Reputation
 - Vanguard Commendation
 - Crucible Commendation
 - XP
 - Light Levels
 
Pick your progress gate! Plenty to choose from.
-Ben Brode, Hearthstone Senior Game Designer @ Blizzard on why they chose not to implement new expansion-specific currencies.