I think I've fallen into the camp where I believe it's more likely they keep Bellinger than trade him, unless they completely fall on their faces over the next week. With that said, I think you have to go after their extreme pitching depth. I'd love to land Max Meyer and Dax Fulton would be a nice option too. I'm not sure Eder would be available, but he'd be a great get too.
PS: Thank god the Cubs didn't select Jacob Berry last year, what a disaster for a "safe pick"