Robin had a bounty of 79 million beri placed on her head, while 8 years old. Bonney has a bounty of 320 million beri at age 12, in the present. It’s good that Bonney has a bounty, she became an infamous pirate. This is good if she joins the straw hat pirates, they all have bounties.
Kuma is great because he guarded the thousand Sunny for 2 years. Bonney is not hated for being close with him. There’s a problem with a 12 year old having a bounty that high in the present. Robin had to witness her home get destroyed , while the WG hated her, starting at 8 years old, for years.
Chopper received a bounty at 15 years old, yet it wasn’t a lot of money. It was probably for being one of Luffy’s (or actually Robin’s) crew mates. Why is Bonney’s bounty so high then?
Bonney can’t be the next Nico Robin, but maybe she’ll betray her allies. She was keeping a low profile so that’s a clue.