I want to go see the last stage of tour de France in Paris but that means I'll have to leave my bicycle parked near a train station for at least half a day, what are the chances of it getting stolen? It a 90s steel frame mtb, in not fancy in the slightest but it's in good condition, specially the paint.

The other alternative is to drive to the train station but I don't want the nafris to set my car on fire.