Well bounties are not necessarily sensible power level indicators.
Jinbe's bounty is so high because his history of piracy is extensively enriched by unremitting adventuring, but despite his long history, Luffy is still crushing him like a fly after simply 3 years of traveling the seas + training.
Jinbe's bounty is so high because his history of piracy is extensively enriched by unremitting adventuring, but despite his long history, Luffy is still crushing him like a fly after simply 3 years of traveling the seas + training.