Durring Fish-Men island when the SH's were fighting the 100,000 fish-men and pirates. I think it may have meant that all the SH's will gain bounties of 100Mil +
Also, with, Luffy's tournament number "0556". I think it has something to do with being, Luffy's next bounty. He also said during the war to, Ace after he released him from the sea stone cuffs that he would surpass him someday. 2 Years have passed after daily tough training. The only way for us to see if he surpassed him is through his bounty. So I'm sure after this Dressrosa arc his bounty will be 550Mil +
There were other things like there where, Dorry and Broggy had bounties of 100Mil then after that, Luffy gained a 100Mil bounty. Then at water seven, Luffy had treasure from Sky Island which was 300Mil beli and he also shouted it out. Then he gained a 300Mil bounty. And another one about the 300Mil bounty during the time when they attacked aqua laguna on the sea train.
Then there was the time when, Lola from Thriller bark said that, Luffy was the 4,444th guy she asked to marry her. Then, Luffy gained a 400Mil bounty.
Also, there's where Zoro always surpasses, Luffy's old bounty so it will most likely be a bounty over 400Mil. Probably 460Mil.
Then with, Zoro fighting, Sanji on Sabaody. He displays blue flames while, Sanji displays red flames. I think it's a hint that, Zoro will gain some sort of blue flame ability. Maybe with his swords.
There was also the time during the Davy Back arc where, Sanji imagined having a daughter with, Nami who looks just like her.
He seems like the only one that can handle, Nami's crazy mood swings since he loves everything about her.
They may actually end up getting married.
Same thing with, Hancock and Luffy. Luffy, continuously said that he owes, Hancock on many occasions. He might end up repaying her by marrying her.
It kind of reminds me of Goku and Chichi.
