Man, this one is tough. The Bears defense just plays better when Hicks is in the game.
But, I do understand the concerns about injuries, a bit of decline, and the cap ramifications. Even with all that said, I find it hard to believe it's worthwhile to trade Hicks for like a 6th or 7th rounder vs what he brings to your team for 2021. However, if they can somehow get a 5th or pipe dream a 4th, then you are actually getting into the draft range where it may make sense for what it means to your future.