I'm in full support of the idea! The idea that a hit will cause an enemy to bleed gold is... GOLD.
im positive I once went through a goblin portal where the path before me was strewn with gold. I remember thinking it was like I was PacMan going around eating the gold everywhere I went. But it never happened again and now I wonder if it really did or if it dd in maybe a different game -- but am pretty sure it was Diablo3