And it still ended with his attack sending Kaido into a volcano, so yeah, he finished it.
"The volcano did Kaido in, but also Luffy was the one who defeated him."
Like, bro, for real, this is unhealthy.
Both Kaido and BM were not defeated by Luffy, Law, Kidd or any of the other people involved in fighting them.
In the end they died to outside forces that were not under the control of anyone participating in the fight.
Which is one of the most dumbests things in Wano. Oda would not even allow the Yonko to get beaten for real. No, it had to be molten rock that does it...
Why would Law and Kid be 1.5 bill, when Crocodile is 2 bill?
Law and Kid should be 2.5 bill. That's the perfect zone, just below the Admirals.
Why would anyone of them have bounties like this? Even Croc.
Roger got his bounty for knowing what One Piece is. Its one of the most dangerous things to the WG.
WB got his bounty for being the top dog on the sea.
3b for Luffy? For what? He could not even kill a Yonko in a team fight without further outside help. BB at least took WBs turf by force and made the WB Pirates his bitch.
Law and Kidd getting the same for double teaming an old hag just to get curbstomped on the next island in a 1v1.
Its a joke.
Never take bounties seriously or apply any meaning to them. Never.