I voted maybe.
We can colonize some worlds better than others... Pluto is a BAD choice, although it can have water...
1. no (near) star (like, ehhhh, SUN..). Where do you expect energy for plants comes from.
2. Temperature is very VERY low.. much terraforming to do.
3. Gravity is too low for humans.
I can also find some futuristic solutions for 1 and 2 (nanomachines and nuclear processes, respectively) but I don't think there's a solution to 3.
but wait a minute!
I heard a planet that don't have all 3 issues AND has some thin atmosphere and water!
It's called Mars.
The Moon is better to settle on than Pluto.
I'd rather check for an arbitrary planet near alpha centauri before I colonize Pluto...
In fact, Pluto is de-facto astroid that
probably came from the "Ort cloud" outside the solar system (although Pluto is in the sun's magnetic field.)
In short, it
can be terraformed in the future, but it would be a waste of time and effort, since at least the gravity will be low.
Perhaps as a passing point to go out from the solar system (Passport report!)
And the damn program gets stuck (yes, in your sig... 1.3.2.)