I wouldn't say I'm non-conspiracy but I think they are hard to pull off. People give the government and humans in general way too much credit.
1. Roswell and/or any other landing/coverup really being aliens from outer space.
I used to be a huge Roswell believer growing up. As I grew older and saw the evidence, I'm convinced it was Project Mogul. The initial report of a captured flying saucer was interesting but what people leave out, it details the wreckage as string, tinfoil, and balsa wood material. If alien ships are made out of that, they deserved to crash. Project Mogul was a special type of high altitude balloon that flew off course. While technically a weather balloon, it was unlike any weather balloon at the time. It was huge, had radar targets, a new type of foil material and yes, string and balsa wood. The balloon was designed to test for radiation in the atmosphere to see if the Soviets were testing nuclear weapons. The weather balloon story was 100% a coverup and conspiracy but it was to protect national security.
2. 9/11 being a false flag. Can be as simple as the gov knowing of the plans but doing nothing about it to cause war.
I don't believe it was a false flag. I do think it's highly possible that some people were tipped off that an attack was coming thus certain people not being in the World Trade Center that day along with the interesting stock sell offs. I also think it's possible that the government might have even known it was going to happen but either called their bluff or possibly let it play out so they could have an excuse to go to war in the Middle East. I think the latter is stretching it though. I think it's pretty well established that the government knew of the plot but just blew it off and didn't think it could happen. As for Tower 7, it's possible that it was a controlled demolition but if it was, I think it was to prevent further attack, to bring the building down in a controlled fashion or there could have been fear that the building was rigged to blow. I think the collateral damage was just something that had to happen for the sake of the country if this is the case.
3. JFK being shot by Lee Harvey Oswald alone. Either not being the lone shooter or being tied to the CIA/Mob etc.
Likely a legit conspiracy. Tough to say if it was the CIA, mob or Cuba but someone wanted him out of there and Oswald was likely a cover story. People have to realize, the government's job is to protect us, the country and our interests. If Cuba someone how managed to take out JFK, you aren't going to want to admit that a foreign entity infiltrated the country and was able to do that to our President. It's a much better look to blame it on a wacko.
4. Federal Reserve enslaving everyone through fractional banking.
Pass on this one. Just don't know enough about it.
5. Bigfoot being real.
It wouldn't shock me if there was a Bigfoot-like creature that existed in the not too distant past due to all of the Native American stories. It could just simply be folklore though. I don't think a Bigfoot exists in modern times.
6. Initial moon landing being faked.
Stanley Kubrick was definitely approached by the government to film a moon landing. Landing on the moon was an utmost important moment in our country and I think we would have done anything to be first which includes faking the moon landing. I do believe we actually went to the moon however but I also believe we had a backup plan if the astronauts failed, made it and died or if the footage simply wouldn't work. We'd have the Kubrick footage ready to go in this case. Keep in mind, some people didn't even know what would happen if we landed on the moon. Some thought the moon might not even be stable and the lander would sink when it landed. I think they had a contingency plan in place. We had to or it would have been a huge cultural embarrassment.
7. Secret societies of any type that run the world.
Definitely secret societies exist. If you mean running the world, I do think a select few families and groups do have all of the power and control where the money goes. Run the world in the sense that they are the puppet masters and control public policy and the ways of the world, I doubt it. I think it's purely money driven.