JFK assassination

In November, I delved into the 1963 assassination of JFk-60th anniversary. I was 14 at the time-1963 -when the President was murdered.
Wow!
I had no clue about politics, foreign policy, etc., and was busy honing my twist dance movements.
The first question for me was: who had the most to gain from the assassination??
Here is a YouTube discussing Robert Oswald, Lee’s brother and Lee himself.
https://www.youtube.com/live/SfM7DiJ2sAs?si=GGmxxfycCQnR5RBD