I'm a fan of One Piece, but I have to say, the current Wano's arc in the Manga is getting forever. Luckily, we are currently getting close to the end (thank Godness); and I think that it's pretty sure the Bounties of a lot characters will increase after this arc... Big Time!!
How much they will increase? Well, the only clue to calculate them are the bounties of those opponents who are defeated. Those who defeat someone with a bigger bounty than their own, usually get bigger bounties after defeating those opponents. For example, Luffy's first reward of 30 Millions increased to 100 Million after defeating Crocodile, who initially had a bouty of 80 Millions. Later, during the Whole Cake's arc, Luffy's Bounty of 500 Millions had a tremendous increase to 1500 Millions; mainly because he defeated two of the strongest members of Big Mom's Pirates, with Bounties of superior to 800 and 1000 Millions. So, with these references, I see the increases of several bounties this way:
+ Monkey D Luffy will likely defeat Kaido in their final round, and Kaido has a Bounty of 4.611,100.000 Berries. So, Luffy's Bounty will likely increase to 5000 Millions, surpassing Kaido's and stayin just one step of Whitebeard's former Bounty. Surely this will make Luffy officially a Yonkou to the world.
+ Eustass Kid and Trafalgar D Water Law will likely defeat "Big Mom" after a really hard battle, and this Yonkou's Bounty is 4.388,000.000 Berries. If each of them had defeated Big Mom of their own, their Bounty would likely increase to match Luffy's 5000 Millions. But since they defeated the Yonkou in 2-on-1, the increase will be divided between them; giving each one a Bounty of 2500 Millions. This would turn them into Yonkous too, but under Luffy's level, which will definitely make them really mad.
+ Zoro has defeated King (1390 Millions) and Sanji has defeated Queen (1320 Millones), the "wings" of Kaido. With this, I believe both of them will get an equal increase of Bounties, leaving each one of them with 1500 Millions as Bounty; Luffy's previous Bounty. Having the same Bounties will definitely increase Zoro and Sanji's rivalry and they will try to surpass the other in future battles. Either way, both will gain the level of "Yonkou's Commander".
+ Jimbe's Bounty after leaving the Shichibukai was 438 Millions, and in this war, he defeated Who's Who, whose Bounty is 546 Millions. As far as I see, Jimbe's new Bounty should at least reach the 600 Millions. It could increase some more, but I think 600 Millions is the minimal.
+ Franky has defeated Sasaki (472 Millions) and Robin has defeated Black Maria (480 Millions). If we add the fact that the CP0 will likely avoid to capture Robin again, I'm pretty sure the new Bounties of both, Franky and Robin, will reach 500 Millions as minimal. Franky will likely be proud of it, but maybe Robin won't be so happy.
+ Nami has always been the Strawhat Pirate with the lowest Bounty (surpassed only by Chopper's insulting Bounties), but during this war, she was forced to her own limits and defeated Ulti; even if she had Napoleon's help. Ulti's Bounty is 400 Millions; so it's very likely that Nami's Bounty could be increased to 420 Millions as minimal. This definitely won't make Nami any happy.
+ Usopp has not officially defeated any of the main enemies of Wano, but he uses to have the unfortunate luck of being in the wrong place at the wrong time. Page One's defeat came from a mad Big Mom, who knocked him off with a powerful punch. Usopp was only close to the place, so it's likely he will get the credit of defeating Page One. And since Page One's Bounty was 290 Millions, Usopp's Bounty could be increased to 300 Millions as minimal.
+ Killer's main battle was against another Supernova, Basil Hawkins, who joined Kaido's side only because the odds were better that way. Hawkins' Bounty was 320 Millions the last time we checked. Therefore, is quite possible that Killer's Bounty will be increased to 400 Millions as minimal; doubling Killer's current Bounty of 200 Millions.
+ It has been hinted that, while all this is happen in Wano, a lot of things are happening in other parts of the world. One of them, it seems Blackbeard got a new objective, but we don't know which one. Either way, since it's obvious Blackbeard will be one of Luffy's final adversaries, then his bounty can't stay behind Luffy's. When Wano's arc is over, we might discover Blackbeard's Bounty has increased by some tremendous act. For guessing a number, I put him 5.276,400.000 Berries as his increase; enough to surpass Whitebeard (5.046,000.000 Berries) but not enough to reach Gold Roger (5.564,800.000 Berries).
+ Brook and Chopper are the only ones who won't get a serious increase on their Bounties, although maybe they will get it if they play a role in defeating the last enemies remaining after Kaido: The CP0. Pretty sure other characters could get big rewards because of their alliances with Luffy's group; mainly Yamato (if she joins his crew officially), Carrot (if she officially joins the crew too), Nekomamushi and Inuarashi.
So, what do you think of these numbers?
PD: I want to add that, ever since DeviantArt changed the Notifications, I'm having all kinds of troubles with the website. I hope these glitches will be solved soon, because I'm working of something really big and I don't want to have bigger problems in the future.