Loot must in some sense sparkle.
Most loot, however, is ill-gained. He's got plenty of loot only technically means that he's got lots of money, because there's a tasty tang of dishonesty about the expression which makes a salve for the feelings of the hard-up and the envious.
If you would like to see something more definitely dodgy then countries have always had a habit of looting stuff whenever they can; a lot of loot is a product of empire, war, trade, or an assumption of superiority.
There's probably something viewable in a museum near you.
Spot the Frippet: loot. Strangely, although the Saxons, Vikings, and Cromwells were notable for their looting and pillaging of England, the word loot itself is much more recent. It comes from the Hindu word lūt.