Final answer:
Nifflers are not kept for guarding property. They are magical creatures known for finding and collecting shiny objects.
Step-by-step explanation:
Nifflers are not most often kept for guarding property. They are magical creatures in the Harry Potter universe known for their ability to find and collect shiny objects, particularly gold. They have a natural affinity for treasure and are often used by wizards and witches to locate hidden valuables.
For example, in the Fantastic Beasts and Where to Find Them series, the protagonist Newt Scamander keeps a Niffler named Pickett who helps him find missing jewelry in various situations.
So, the statement 'Nifflers are most often kept for guarding property' is false.