TL;DR:

✅ 4G is the best choice for:

✔️ Privacy-focused users who want to avoid IMSI catchers.

✔️ People in high-risk professions (journalists, activists, whistleblowers, etc.).

✔️ Users who want strong encryption without the experimental risks of early 5G.

✔️ Those looking for a balance between security, stability, and battery efficiency.

❌ Avoid 2G and 3G completely as they are outdated and vulnerable.

❌ 5G is not fully private yet due to carrier-side tracking, although it has potential in the future.