The thing about Bounties, I don't think many people understand what it represents.
Some People think its about all, Luffy can beat this guy, or that guy, and so on…. so he should have a higher bounty etc....
But its not all about Just Muscle and Beating a guy down.
Bounties are Given for a person Strength, Power, Knowledge, Connections, Friends, Crewmembers, and other things which are a threat to the World Government.
Enel's Case His ability is so powerful that he would have a bounty of 500.000.000 if he were to stay on earth. thats Pretty high.
Dragon is the Worlds most Wanted Man and his Bounty Must be CRAZY.
But it does not mean Dragon can Beat Whitebeard the worlds strongest man in a fight. Even though Dragons Bounty is higher According to their Titles Whitebeard should be able to beat him in a 1 on 1 fight.
People Going around Saying Guy A bounty is higher than Guy B thats mean guy A can Beat guy B. it doesnt work that way, I know many of you know this but their are some who still dont.
Lets look at Shanks and Mihawk their Equal in Strength As indivduals(Mihawk would disagree)so they would have a similar bounty, if mihawks bounty wasnt frozen, but when you Consider how much of a threat Shanks is to the World Government his bounty would Far Surpass Mihawk's Even if his bounty wasnt frozen.
Shanks Got a STRONG CREW, Which Makes him One of the 4 Emperor, His Knowlegde, and Rogers old Crewmate, Also Shanks individual Strength, and others, ALL THIS ADDED TOGETHER gives him whatever bounty that shanks has and his title of the Emperor. ( and i Mean Most of his bounty Comes from his Strong Crew.)
Same thing with WhiteBeard 48 pirates division under him. Filled with STRONG PEOPLE. This is what makes him the most Powerful emperor and Strongest Man on the Sea, Also God of the Sea (garp: we have angered the God, emperor, king of the sea) Ruler of the Sea. etc..
Even mihawk was Pondering more about this when he saw luffy's power to make Friends all over the world who would Ally with him.
this is the most important thing to have imo for a high bounty = ALLIES.Friends, Nakama, etc…
This is Especially True for Captains of Pirate Crews.
Lets look at joz 3rd Divison Captain of the Whitebeard pirates Aka Diamond Man.
His lower rank than Ace but Joz seems to be able to take on the Worlds Strongest Swordsman Mihawk (that is if mihawk Really cant cut him), who seems to be able to take on Shanks(maybe even Beat him with one arm gone and mihawk doesnt have no interest in him no more) and shanks Exchangeing Blow's with Whitebeard. Even though i think many people take that too far as to say that Shanks is Whitebeard's equal etc… While the only thing they did was exchange Weapons Strikes. and dont get me Started on BlackBeard.
Like i always say One piece is Unique its not like DBZ, Bleach and Even what naruto has become now Where if your Power lvl is higher etc you can beat this guy. NO it dont work that way in one piece.
The Strongests of one piece characters can lose to guy's or girls whose abilities dont work well with that opponent, or atleast give the Strong Character a hell of a tough time. Example Luffy Vs. Enel.
Bounties Represent the level of Threat To the World Government.
with all that said , After the Recent events in the manga luffy should have an increase in Bounty and Even buggy.
Luffy 500 Mil
Buggy 250 Mil
Crocodile 320 Mil
Jimbe 320 Mil