My opinion on aliens is:
Yes, they do exist, but not in the way media shows. The universe is incredibly big, so I doubt we are the only life forms in the universe. We also have found some proof of life, such as water/ice on different planets or moons, and there was one point where we found a chemical on some exoplanet that can only be made by life? I don't remember the details on that. Although I believe there is other life out there in the universe, I believe it's unlikely that it's intelligent life.
As for the pyramids, they aren't a subject I've looked too strongly into, so I don't have a full opinion. I do believe that humans thousands of years ago were very smart and had technologies we don't have today, but they also didn't have a lot of the technologies we have today. I wouldn't find it completely unreasonable to know that the Egyptians or some other civilization built the pyramids.
YES I so agree with you on the aliens exist but not how they are portrayed in the media! The proof of life shit is so cool, I once did a whole speech about how we could grow life on mars, like farming...a lot of hydroponics and other bullshit I can't remember, but it's possible! And I DO kindly have to disagree on the intelligent life, I mean come on you think EVERY single UFO sighting or anything of the sorts has been FAKE? I don't think so.
As for the pyramids, ive listened to a LOT about them. Here's my two running theories that I like the most. 1. The Egyptians had a lot more technology than we do now, but not the same. There's this thing that always creeps me out about the pyramids is their latitude and longitude coordinates LITERALLY match the speed of light, coincidence? I think not. BUT if I truly believed in this theory I would also have to believe that dinosaurs were real...Im on the fence about that. But theory one relies on the asteroid that killed the dinosaurs also took out the ancient Egyptians technology. Now option 2. The ONLY other theory that makes the most sense to me, is there is LOTS of evidence proving that humans were SO much bigger back then, like the average height for a man was 8 foot or something like that, that's the only way that humans could've built the pyramids. OR aliens did it...but that's a theory for another time.

















