IMHO though we live in a "post scifi" age now (2019!) and should rather discard most of the mainstream utopian/dystopian fantasies already. At least until we manage to envision some pragmatic solutions to the very real and pressing problems we have on this planet right now.
We need to work together if we want to even have a slight chance to survive the next couple of decades collectively. We need some genuinely new utopian thinking if we want us all to survive.
Most of these billionaire "backup" plans as well as middle class "prepper" movements are dangerous distractions (and unlikely to "work out" for the cohorts pushing for them anyways).
If we like it or not we are in this together.