I'm encouraged by the fact that Ainge seems to value Bradley appropriately, even if many on this board do not. If we were to get Fultz or Ball, I do agree someone should be moved, and my guess is it has more to do with what is offered rather than who we want to move.
If we get a prospect like Fultz, I'd rather move Marcus than Bradley. I know he is 3 1/2 years younger and I love the guy, but he has a very long way to go on offense, and it is entirely possible he never gets there.
Bradley is already a very good offensive player and our best stretch shooter. He also can cover people no one else can, including Marcus. Marcus is an amazing defender, but Jaylen Brown will be able to handle many of the same types of assignments.
I also see no reason to sign a very good player like Hayward if it means we have to get 50 cents on the dollar for a really good player like Bradley, Smart or Crowder. The only free agent that is worth doing that for that might be available is Blake Griffin.
In case anyone has noticed, having Stevens matters, and having the same guys stay together is resulting in fairly steady development all around. Bradley, Smart and Crowder have all proven they listen and grow in this system. We've got an investment here and we should see it through, unless we can get a top 10 guy.