Why Nico Robin has the most undervalued bounty among the Straw Hats!

Why Nico Robin doesn’t have an above 1 Billion Berries bounty and she only has a 130,000,000 Berries bounty?

1- Robin has a powerful devil fruit

2- She’s part of the “5th Yonkos” crew

3- She was involved with the Revolutionaries for two years.

4- She escaped Enies Lobby

5- She is the only person that can read the Poneglyphs which means:

-She can find out about the Void Century that the World Government is trying hard to hide;
-She can find where Laugh Tale is which is what the Marines don’t want.

At this point, keeping her bounty low is an excellent move by the World Government.

Remember, the public doesn’t know anything about Nico Robin. The reason she got her first bounty of 79,000,000 was because she escaped Ohara, yes, but the World Government reported it using the fact that “she sunk 7 battleships” as justifications for her bounty.

For an 8 year old girl on the run, this raises eyebrows and let the masses know that she’s dangerous. Then she disappeared for 20 years and resurfaced in Alabasta after Smoker confirmed her whereabouts. Aokiji verified this info and the events of Enies Lobby unfolded.

So keeping her bounty low hides the fact that she’s secretly super important, and prevents her from being singled out by common bounty hunters.