I'm a firm believer that we've already been visited. There is just too much evidence out there to believe to the contrary. There are a bunch of folks out there who take this stuff seriously and have spent considerable time uncovering evidence through FOIA requests, eyewitness accounts, etc. and have shared what they have found. If you actually look at the evidence, it is pretty clear that we are not alone and have been visited by Non Human Intelligence. I'm aware of all the objections that are typically made when encountered by claims such as this, but they all have logical answers if not direct evidence disproving them. Seriously, if you are at all interested in this, take a deep dive into what you would normally consider a conspiracy theory on the order of something like pizza gate and try to reconcile how so many government documents from around the world indicate that those crazy conspiracy theoricists might be on to something.