A dragon hoard is cursed, but what if the treasure is taken after it has passed through multiple hands. The treasure is set to go after thieves, but after a couple dozen transactions, are they still thieves.
I totally see someone using cursed treasure to eliminate others, then reclaim it safely.
There is a common theme of you can't protect yourself from your own energy. I wonder if the curse is best suited to mess with dragons, they would see each other as the greatest competition.
While the curse is sure to be awesome, I still think there would be ways to by pass it. Dresden is always learning secrets that would get him killed so why not one more. We know there are very few true dragons left, 2 I think, so there treasure would be very useful. Not for the wealth, but the artifacts, knowledge and magic they would contain. They might be a treasure hoard, but you can bet, there is enough to make it an armory in the right conditions.