In God Of War, Aegir Gold is basically most common resource - you can get a plenty just by roaming around Lake Of Nine. After finishing the game, I had around 1000 of this resource. Yet, I haven't found a single application to it, except selling it. Judging by the amount of Aegir Gold game gives you, it could be basic crafting material needed for everything, but I haven't found literally a single item requiring this resource to craft.
So, my question is - what's the purpose of Aegir Gold?
PS: I consider the possibility of this to be a persistent source of Hacksilver, yet it is really weird decision to give a player resource to sell instead of actual currency.