Perhaps the elves ran off with the money from the banks?
I can BELIEVE that!
Actually the idea of Huldufólk here is in many ways akin to the high elves of Tolkien´s (except the pointed ears of the movies), that is something angelic, but dangerous in its temptation of deadly beauty. One famous poems says something like that when the tempted man answers the beautiful elven temptress invitation:
“eigi vil ég með álfum búa,
heldur vil ég á krist minn trúa”
in english something like:
“I don´t won´t to live with elfs,
rather I wan´t to believe/trust in my Christ”