I've been playing Skyrim with a mod that adds weight to coins and I'm really enjoying this 'realism' play-through. It occurred to me that having the ability to create a stash (ala Stalker) any place and would hold coins, gems, and maybe lock-picks would be helpful. In the same way that camping mods let you add an object to the ground, this mod would let you add a pouch ideally, or small lock box to the ground that could only hold small items for the sake of realism.
While writing this request, I thought that the chance that an NPC could find your stash and steal it would add even more realism and risk to such a mod. A bank and coins with different values would be a welcomed addition to Skyrim as well. Other ideas are welcome, or if such a mod already exists, please feel free to add to the conversation.
The mod I mentioned is http://skyrim.nexusmods.com/mods/6630 by trira/elecgs.