Is a blood pressure reading of 98/50 something to be concerned about?

Depends. On the presence or abscence of symptoms such as lightheadedness/ fatigue and what your "normal pressure "is. This may be normal for you if there is no history of hypertension.
Healthy BP. A BP less than 120/80 is healthy. If you were on multiple medications with the purpose of 'treating' or controlling your blood pressure then you could possible decrease the dosage a little as treating to less than 130mm hg usually is not helpful for simple hypertension. However, if you're not taking any medications for blood pressure control, then congratulations you have a healthy blood pressure.