Since the David Grusch stuff came out a year or so ago I've looked very much into all of this. I'm coming from a perspective of one that never gave much attention to the alien stuff and never really believed it wasn't just advanced Air Force tech.
Well, through the past year I've decided that there is something behind all of this that is truthful. My most educated guess based on everything I've looked into is that the aliens aren't from another planet, they're interdimensional beings and involved in watching over this planet for some reason. I'm a believing member of the LDS church and feel that these things are somehow related to what typical religious folk would call "angels" and "demons". That may sound crazy, but after reading quite a bit, I'm not convinced it's all bogus.
I'm looking forward to more info surfacing.