Our best chance for a spare civilization in the event Earth gets wiped out is to build underground on Mars. Not enough protection from the atmosphere from radiation and meteorites, but apparently there is enough water trapped below make a go of it.
There are a number of options for colonization off-Earth, especially given increased material wealth via robotics. I don’t think humanity would long survive the destruction of Earth without viable colonies in other solar systems, but occupying our system might buy time for someone to come up with the warp drive.
Anyway, I’m not trying to highjack the thread, and I have to get my yardwork done before it gets too hot, so I’ll bid you a pleasant Sunday.