Counter question: What's the point of surviving in a world where most of humanity will suffer terrible deaths? Aren't we better off focusing our energy on trying to effect change, helping the commons, instead of purely focusing on the self?
As for hedging - I'm fairly certain that, for people living affluent outside the tropics or high latitudes means that the effects that'll really get them are largely systemic. There's not much hedging to be done. (Sure, some areas will have slightly milder climate extremes, but food's still gonna be scarce. Pandemic and war will still be felt. Civil war is an option almost everywhere. Migration will still heavily impact local economies.)
That's why I asked the counter-question - to highlight that this is really, if we want to or not, either a collective undertaking or certain misery. Isolation, or even anything but very basic hedging, is not really feasible for most people on this site.
Will people migrate over time? Yes. Does migrating now vs. later make a difference? Much less certain - because those people migrating later? They're probably going to the same places the "migrate now" people have moved to. And at that point, it's going to be wholly unpleasant for both groups.
I mean, yes. Don't buy farm real estate in Arizona, or waterfront property in Miami.
No.