In chapter 957 when they talk about his bounty they never brought up his crew or his territory
Being apprentice on Roger's crew didn't boosted Buggy's bounty by a lot so Rocks crew shouldn't be better
That's huge for Kaido sure
But How much worth the Guy who surpassed him as he acknowledged the guy worthy to be Joyboy
We know Luffy's bounty is too low but that's a huge proofs
I think it should be around prime WB Level

Being apprentice on Roger's crew didn't boosted Buggy's bounty by a lot so Rocks crew shouldn't be better
That's huge for Kaido sure
But How much worth the Guy who surpassed him as he acknowledged the guy worthy to be Joyboy
We know Luffy's bounty is too low but that's a huge proofs
I think it should be around prime WB Level