In my heart of hearts,-(with no proof)- I believe it is possible that civilizations advanced as we are today could have come and gone, in the grinding procession of time.
You are by no means alone. I'm reading a book right now written by American Egyptologist John Anthony West, Serpent In The Sky, and West argues the pyramids at Giza and the Sphinx are over 30k years old. Radical theory granted if not seemingly impossible but what does standard history say of those pyramids? Built by Pharaoh Khufu in a 20 year span around 2650 BCE using 2.3 million blocks each weighing tons with a finish tolerance of 20 thousandths of an inch? Even greater, with this many blocks, to be completely in 20 years, this would require the laying of 12 blocks per hour, 24 hours per day, 7 days a week for 20 years to complete the project. I'm not sure we in our age would be capable of such a feat or if we could the cost and resource requirement would be so massive that no sane person dare undertake it.
My interest in Egypt goes back to Yahweh/Elohim sending Abraham and later Jacob to Egypt to be saved from famine while understanding that hunger or food can also be a metaphor for gaining knowledge or wisdom and were the OT writers saying something else. I do think the ideal of monotheism has more linkage to the worship of Aten, the single god of Amenhotep who changed his name to Akhanaten. As another side note, C.B. Demille in the movie The Ten Commandments had the character Nefretari played by Anne Baxter and in the movies, Nefretari and Moses had something going on. With the growing suggestions of Akhanaten and Moses being linked and that Akhanaten's Queen was named Nefretiti, where did Demille get the character name and was there more to the name than just the difference of "i" being made into an "a"? It's an interesting sidenote that for the moment seems to go nowhere as I can tell.