thats true... its all dependant upon the shape of your current car. i understand that there are lots of miles on it, but if its in great shape and not in need to too many dire repairs, and you dont see anything going bad anytime soon besides maintanace issues, then keep it. That way you can save up for something bigger and better. might as well get the most out that car now. After 200,000 something miles the value of the car cant really get any worse.
Or buy another car, use this one as a beater! :D