Data Science is fully applied field that is why It has lots of opportunities and have good career path. After completion a degree in Data Science you can mainly work as a Data Scientist which is best career for Data Science. Also, apart from that you can become a Data Analyst too.
Also, if you have a profound interest in research you can go towards the Phd degree in data science ,where you can choose interesting topics to do research on big data utilization , applied machine learning. Doing a Phd degree in data science opens up a lots of upper level posts such as Senior Data Scientist also.
Apart from that, best career opportunity may depends on your overall interest and passion.