The link you provide is a nice short article, the gist of which is:
"...
According to Reid Hoffman, co-founder of LinkedIn, the prepper movement among tech-made billionaires is largely inspired by fear that artificial intelligence will one day displace so many jobs that there will be a revolt against those behind the technology.
..."
While my personal opinion of many of these people makes me want to get a torch and pitchfork to join the horde, I find it ironic that they fear the result of their own efforts...
These types of people are worth adding another line item to my threat analysis spreadsheet: "Deposed Wealthy" or "Formerly Wealthy"...
I don't put too high a risk factor on these people, but neither would I trust them after a TEOTWAWKI event.