Sounds like stolen booty.

See:
https://www.archaeology.org/news/697...-gold-treasure

"[COLOR=#000000 !important](Vejle Museum, Flemming Nielsen)
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HJARNØ, DENMARK—The Copenhagen Postreports that a metal detectorist discovered a collection of gold and pearl artifacts on a small island off the east coast of Jutland. Dated to about A.D. 500, the jewelry may have been hidden from the Romans, according to Mads Ravn of the Vejle Museum. “They’ve probably been down there on a mission to plunder, so our little find is a reminder of a turbulent period in world history when gold spoke its own, very clear language,” he said. A volcanic eruption in El Salvador and the resulting ash cloud and climate change could have also prompted the burial of the treasure as an offering to the gods, Ravn added