Woman Worrier; I fully understand what OK is getting at. That's why you need to have a thorough inspection done on the car. The braking system is something you can't skimp on, for instance. If the car needs significant work to make it safe, I would sell it.
If the car can be made safe for $1000+ or so, you could keep driving it for old time's sake. It would still not be totally reliable, since old cars have things fail on them.
A fellow down the street has 2 antiques; one a not running 1976 Volvo his aunt left him and a 1976 Volkswagen Rabbit parked in his garage, but never used, an inheritance from his dad. His wife resents having to drive around these deteriorating objects, but he refuses to get rid of them.
In any case, the decision is yours, but both OK and myself would not want you to drive an unsafe car. If you are thinking of using this as your main daily driver, I would recommend against it. A 1989 car sitting outside in the cold, unless it has a block heater, will not be good daily transportation.