Perhaps that's true, that they're all dangerous in some way, but Bucky knows that things are different in his case. He wonders if John would be as kind, as relaxed, if he knew just how many deaths of innocent people is on his hands, and how many decades he did nothing but kill to the tune of HYDRA pipes.

He's not about to explain.

It's unlikely that he'll ever take John up on his offer, he's more likely to sink back into the shadows and obscurity. But maybe-- maybe he'll remember sometimes that it's nice to have company, and he'll risk it, so he doesn't dismiss the offer out of hand. He just nods slowly and offers his gloved hand to shake.

"Thanks, I'll remember."