I want job security in my future, is a PhD right for me?

For more context, if I do pursue a PhD in would be in a STEM related discipline (computer science, stats, math, etc…)

I imagine I would enjoy pursuing a PhD, but what I want most of all is job security. I want to be able to sleep at night knowing I will always have the opportunity to work, no matter what. Income is obviously a little important, but not as much as job security.

My passion is in data science, so although I could go become a nurse, or a HVAC tech, that’s not what I enjoy. I want to maximize my job security within a STEM related field.

I also often hear that I may become overqualified for many jobs if I pursue a PhD, so would a masters be better? I don’t care how many jobs I’m overqualified for, I just want to know that I won’t have trouble finding a job.

Any feedback/advice is greatly appreciated, thank you!