3. Bellinger's talents are not easy to acquire
There is already a serious lack of power on this Cubs team with Christopher Morel and Cody Bellinger seemingly the only ones capable of getting close to 25+ home runs this year. He's also the only consistent left-handed hitter on the team. The only one who can hit for power anyway. Ian Happ has been very up and down this year, Mike Tauchman is a replacement-level player, and Tucker Barnhart and Miles Mastrobuoni are just bad hitters.
Not to mention there aren't a lot of great hitters who are set to hit free agency this year. And the farm system isn't exactly flush with lefty bats. Matt Mervis has been great in Triple A but he hasn't figured out how to succeed against big-league pitching yet. Unless the Cubs plan on making a run at Shohei Ohtani, lefty power is scarce right now.
Bellinger's agent Scott Boras said that it's not every day a 27-year-old former MVP, rookie of the year, and World Series champion walks through the door. And I couldn't agree more. That's why I don't see the logic in moving Bellinger because he's the type of hitter you need not only now but also when the team returns to the playoffs. He's a proven big-league player and trading him for more lottery ticket prospects is kind of foolish especially because he's still on the rights side of 30 years old.