Humans among us?

This is creepy because I was just talking with some of my coworkers about this Theory
That aliens are actually humans from the future who have traveled back in various points of time possibly to observe historyhttps://www.the-sun.com/lifestyle/tech/289065/aliens-may-be-humans-as-scientist-argues-ufos-are-piloted-by-time-travellers-from-earth/