system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragons] Why do dragons hoard gold?

In ever story and every movie they steal and hoard gold. They can't spend nor would they need to as they can take what they want.
gpt
It depends on the specific dragons. 

Some require a bed of rather specific hardness to sleep comfortably, and Gold offers the more readily available material for them.

Others value the wealth, for any number of reasons. It can offer them financial leverage with which they can exercise their influence without resorting to using their physical or magical might. It can offer them a lure for their favourite ego-padding meal : under prepared mortals. Some are even afflicted by simple greed, ajd desire it simply because it is wealth.

Other Dragons use it as a food source. A rare characteristic, but some varieties of Dragons subsist mostlly on minerals and metals, with gold being somewhat of a common nutritional base.

Others seek to keep the gold from mortals, knowing the lengths they tend to go for wealth. For them, the Hoard is their attempt at staving off the greed that spurs mortall races to violence.

The reasons are really as diverse a are the world's which contain Dragons.