Nessie and the Viking Gold - Nessie's Grotto, #2

Linda and Craig have returned to Loch Ness.  This year they are not the only guests at Mrs. Carmichael's Bed and Breakfast.  Sverre Thorburn and his daughter Anna have their own plans for Nessie.  Sverre Thorburn wants to record her voice. Anna wants to attend a concert by her favorite pop singer at Urquhart Castle, directly over Nessie's Lair. Linda is torn between her desire to attend the concert, and certain knowledge that the sound waves from the percussion instruments would destroy Nessie's Grotto.
Were the coins Craig stole from the Vikings blessed or cursed?