It will be converted into computronium before this time in both good and bad AI scenarios.

Closest approach to Earth is 0.71 AU in 2047, with another close approach in 2049. It looks like that would be the time one would have to grab it: launch a probe in 2047, rendezvous out past Mars in 2048, and redirect it for Earth return in 2049. Similar to an asteroid recovery mission, but with a very small and structurally rigid payload. Still, I doubt anyone will pay for it.