What niche topics are less saturated and still useful to learn?

I’m selecting electives for my masters degree (I have 4 classes left) and I am debating between courses in Time Series Analysis, Computer Vision, Intelligent Systems, and a whole bunch of data engineering courses.

Full course list below:
https://sps.northwestern.edu/masters/data-science/curriculum-specializations.php

Considering I need to write a thesis after taking these courses, which do you think will be most interesting and useful for industry and/or my thesis? I’m not sure what my thesis topic will be yet.

Currently I’ve taken all core …

analysis computer computer vision course courses data data engineering datascience engineering intelligent intelligent systems learn list series systems thesis time series topics vision