Eh, the JFK assassination is more people wanting a conspiracy over the boring explanations rather than an unsolved murder.
Personally, I remain agnostic but find it fairly credible that Oswald personally met a group of conspirators from the CIA a few days before the shooting and these people encouraged him to do what he did, maybe even made him some false promises about what would happen afterwards. It's also not unlikely that the killing of Oswald himself followed a similar pattern.
That's all speculation, but overall reasonable speculation, because of the existing motives. Many conspiracy theories are weak, because they fail to lay out a credible motive. JFK is not one of those cases.