Nick Bostrom's research costs £6.99. It is not a research, it is a quick way to make money while the window of opportunity is still open by doing cargo cult science.
I am yet to hear a decent argument about how AI will wipe out the earth. It starts to belong to the same category as politics, nobody knows what they are talking about, but everyone has an opinion. Even the so called "smarts". I remember there were news about Stephen Hawking being concerned about AI, if you watched his interview, he literally pointed his software to the "Existential risk from artificial general intelligence" wikipedia page and read the abstract... Elon Musk started by comparing AI danger to "The Terminator" scenario. Seriously a f* movie? How about we don't go to Mars because of the "Alien" movie? Now he says that "not all scenarios are benign..." - no shit, Scotty.