Feeling a bit anxious about bringing my doll outside

I'm planning to bring my doll to a con in a few months so I'm gonna buy one of those cat carrier bags to carry him around in and be on full display.

But also, this is a 400 dollar doll and I would be devastated if he got stolen. I'm even contemplating putting a lock on the bag's zipper just to ease my worries a little.

Not me feeling like an overprotective doll mom.