I'm giving Oda a benefit of the doubt but what the fuck did Blackbeard do when Luffy was in Wano to get a 1.749 billion increase?
It's not even funny anymore, Blackbeard was worth 2.247 billion at the end of Act 1, then at the end of Act 2 he announced that he's leaving his island to get something. You don't just get 1.75 billion increase for just sailing to another island.
As I said, I'm giving him benefit of the doubt but I feel like there is no real reason for the increase.