sadly only 500.000.000
Even ace, who was weaker and not even captain, had more.
wtf oda plsz
I think people need to start accepting the Ace hype and stop trying to downplay him for being beaten in Part 1. He lost to BB who had a clear advantage with his fruits ability and is hinted at being the biggest threat in the manga so it's not like Ace was taken out by some no name jobber.
Secondly he was shown to be the strongest of the ASL every time they're shown, so unless he seriously slacked off during his time with WB(which let's face it seems insanely unlikely) he should have still been slightly above Luffy and Sabo until the time of his death(Luffy and Sabo have each gotten an extra 2 years to surpass Ace which is why they look like they would blow him away now)
Third and I know this is a very debatable topic with a lot of people saying there's no evidence so that's that, but Ace was killed before evidence fully got a chance to shine through the manga so I feel the haki question should be left open and not just a closed case. Reasons: Ace was a Logia in the New World where "Logia's who rely on their power die" Ace showed in his fight with BB he kinda relies on his Logia powers so why is he not dead? Some say because he had WB's name behind him but then how does he make an over 500 mil bounty if no one confronts him? Mihawk was never shown using Armament Haki before the skip but was implied he has it after the time skip and its' fully explained intro during. If Ace's character had been left alive post skip I imagine/believe that he like pretty much every other high tier character in the New World would have shown haki. Also lastly the punch that killed him, as a Logia it should have went straight through his body and into Luffy right(Akainu wasn't showing any haki during that punch correct?)? Since it didn't it implies 1 of 2 things, Logia can choose to be intangible or not and Ace decided not to be intangible and take the punch to save Luffy or, Ace used haki in his body to reduce the force of the punch.
All that said I think Bounty Price escalation is one of the few things Oda didn't really consider. How do you have Croc a Shichibukai at 81 million bounty but Bellamy had a 55 mil and then a 195 mil? There's no world where Bellamy is more of a threat than Croc. Maybe Croc got his Shichibukai invite early on in his Pirate career and his bounty cut off early?