If you're looking for the most believable conspiracy theories out there, I'd say the one that says Jeffrey Epstein was murdered and it was covered up as a suicide is way up there.
See, it’s still a conspiracy if he committed suicide. I don’t see why people are obsessed with him being murdered, or makes no difference in the end because the chain of events leading to either outcome is pretty much the same. IMO the suicide is more lurid because all the things had to happen to give him the time, tools, and someone basically telling him to do it or someone would indeed kill him. The man knew he was fucked, and there’s zero distance between him being told and others just setting it up knowing he was suicidal anyway.
Point being - there absolutely was a conspiracy to give him opportunity, tools, and lack of monitoring so he could kill himself. The pursuit of anything to do with his associations or activities was dropped so fast it approached relativistic speeds as it vanished into the distance.
So, actually our federal prison system might just be that trash. Like super over crowded and super under funded. I wouldn't be surprised if there was a conspiracy to let him do it, but you can't actually say there was with absolute certainty.
Or the theory, given how many meetings Epstein had with the former PM of isreal, that he was working for Mossad/CIA to create a large honeypot/blackmail ring of highly influential people and politicians.