I know you use gold/silver to buy things from NPC merchants, but the things they sell don't cost very much. What is gold/silver actually used for? Please don't tell me it's just buying items from other players. Is there some endgame grind you need massive amounts of gold for, like how in Maplestory you need mesos for cubing? Help me out here so I don't feel dumb for all the manual gold farming I've done and am going to do.