Suggestions for useless currency
These are currencies that keep getting capped and have no useful way of spending besides Glam Prisms/Dark Matter/whatever, and how could you solve their problem.
Company Seals: You could spend them to get a single FC buff to yourself (FC not required). Most of those buffs are too selfish and situational for a whole FC to make good usd of them. Also, Company Seals are so easy to farm, having a reason to spend them constantly would be nice.
Poetics: You could buy old dungeon gear with them. Farming dungeon glams is a pain in the fucking ass, there's nothing fun about it, and Poetics are already used to buy old stuff anyways, for me it makes sense.
Wolf Marks: Exchange 20000 Wolf Marks for 1500 Trophy Crystals.
Trophy Crystals: Exchange them for previous Series and unobtainable Feast cosmetics. These should be expensive: a full set of gear or a mount should cost 20000 Trophy Crystals. I seriously dislike limited stuff.
Bicolor Gemstones: Expand the FATE system up to ARR and give us more stuff to buy for the love of God, even if it's just minions and orchestrions.
White Scrips: I have no idea what to do with them.
Achievment Certificates: Why do these things exist? Make them achievments for getting achievments, put the rewards there and give us titles.