If his opponents are chosen carefully and Virgil Hunter maximizes his skill potential ,yes.

I doubt it. The top ten at 147 are all in with a shout of knocking Khan out in my opinion, it would take some expert cherry picking to protect his jaw. I think Mayweather, Bradley, Pacquiao and Marquez would all beat Khan, Brook, Alexander and Berto all stand a better than average chance too, so that doesn't leave Khan with many options,

He can't campaign successful anywhere. He's all speed, little skill, and no chin.

Maybe but if he fights top OPP no,