Every team is going to look to improve certain aspects of their team. If the goal for the Celtics is to incrementally improve some of the depth (a perfectly reasonable assumption), they are not going to trade Derrick White to do that, as was the supposition in the original post. I don't believe that Derrick White is going anywhere, any time soon. Anything is possible, but I don't see it.
Mitchell Robinson is a different issue. Traded on his own or with draft picks, he is not going to get much return. He has been a disappointment so far. His under-achieving has impacted the team's overall big depth. It was a weak area to start, and he is not helping at all, at least not so far. I could see this as an area that the Celtics try to address but they are not going to trade White to do it, in my opinion.