The alien trade, is a supposed Human trade involving aliens of various species,
Utilizing humans as chattel
The human abduction phenomenon gained steam around the Eisenhower Admin( speculated he signed a treaty with certain aliens
Allowing then a few hundred " specimens a year)
Zeta Retuculans ( supposed greys)
Worker caste of aliens
some are used for friendlies and others
for reptilians
Reptilians( want us for food)
Look up Dulce New Mexico
1978 gun battle
And others ( want gold since despite their advanced tech can't replicate it, but it is
Essential to repairing their homeworlds mass atmosphere
Despite our species being chattel, hybrid offspring are produced
Some claim its so the Aliens can safely inhabit earth , because their species may be infected by earth's various viruses or diseases
So they'll grow hybrids, so they can provide immunity
There are a few " friendlies" such as Nordics
Who want to see Human kind evolve into enlightened beings, and some even believe Humans are supposed to
Hwad a intergalactic Alien federation
Not unlike Star Trek