What if:
Add in Agnes quests with reward for any bosses? Just example, if u kill Astaroth u can get ~30kk gold (it just simple example). We can w/o Agnes even, we can use guild board with this quests, of course with ranks board. Stronger rank - stronger quests up to dark core last boss.
it seems a good idea, maybe they should just give all mobs and bosses gold drop also. Currently when we kill mobs we get earth/ice/fire dust. And from boss we get arcadia coins. Every mob and boss should drop gold also. If every boss drops 5m gold and every mob drops 50k gold our problem would be solved.
Agnes had gold in exchange for diamonds. Here you would get gold for killing a mob/boss. in my opinion it will cause even more inflation