In the first campaign that I ran in my fantasy setting Gehennum (then called Jehannum) the PCs were set the task of obtaining the Sword With No Name as the bride-price of a princess whom one of them fancied (long story). Research indicated that this must be in the hoard of the dragon Chlorophane, which was most likely on the other side of the planet. They had to do six impossible things to get into his lair, where they found him sleeping on a pile of gold and jewels six metres high and twelve metres in base radius. They got away with the sword, with three-quarters of them still alive and one completely uninjured. Unfortunately (i) they put out the dragon’s fire to cover their escape, and that pissed him off (2) he overheard with dragon hearing the magic word that opened the magic casement that opened from their castle to a ruin twelve stades from his lair, and (c) Chlorophane was a magician.
So, a couple of resurrections later the PCs had (I) a big wedding coming up, (b) a bitterly resentful emperor as the father-in-law elect, (3) a large but overgrown estate with a dilapidated castle that they were obliged to garrison, (iv) a desperate need for quite a lot of cash, (§) the decomposing head of a very imposing reptile, and (VI) a bit of an idea about where there was an island with a cave containing a mound of the readily-negotiable.
Getting there without a charmed magic casement was a bit of a trick. The PCs had to chase away the younger dragon that had taken up residence. It turned out that the dragon, being vain, had built his stack of loot with the pig iron and bronze tripods in the middle and the gold, silver, and objets d’art as a comparatively thin shell on the outside. The PCs ended up paying the iron and bronze to a fleet of ship-elves as freight to get the gold, silver, and objets’ d’art shipped to the port nearest their home, carried to their castle, and stacked up in the basement. There were 880 packing cases of it, each quarter of a cubic metre. It didn’t all fit in their basement: they had to re-occupy an abandoned Elvish bailey fortress in the next valley to stack up the overflow.
The rest of the campaign consisted in large part of dealing with the political fallout that the mere rumour of their wealth produced. During the civil war that ensued they once had to give up their castle to an enemy army: five thousand men looted their castle and each carried off all the gold he could carry. The army was destroyed and they PCs were not appreciably poorer.
Towards the end the figured out that one of their problems could be solved by using a legendary item called the “Crown of Rhadamanthus”. A hired scholar traced it into their hoard. They sighed, and took on a small god in hand-to-hand combat as the easier task than finding a particular object in their money-bin.
A great time was had by all.