Question about car mileage?

What are the chances that my car, a Chevrolet Cavalier (year 2000) will make it to 200,000 miles or more than that. I drive 40 minutes back and forth to work 5 days a week. Some people have told me they don't think it's going to last that much longer. I get the oil changed every 3000 miles and get the tires balanced and rotated every 6000 miles. Doesn't that help?