Everything of any value is locked in the safe. If, God forbid, some thief did access our cabin, I guess they could steal our clothes. Maybe the luggage and charger cords. Pretty slim pickings, IMO. I guess they could order up a bunch of stuff or make an international call on the cabin phone at $$$/minute, but that seems kind of iffy.
I wonder how often thieves break into cabins. I guess the targeted haul would be laptops, tablets, & cameras. And maybe jewelry and credit cards if folks leave them out. If the thief got lucky they might cover their cruise fare. It just doesn't seem worth it to me. If it happens I would think it is more of a dishonest person taking advantage of an opportunity as opposed to a pre-planned crime. But, what do I know.