You are a kid in their early teens who already has a bounty of 50,000,000 beli, you have extreme luck which means everything goes in your favor and this made you a great gambler, one day a group of pirates found you while you were playing cards

Zoro: Hey look, a game of cards Chopper: Cool Luffy: I’m hungry… Usopp: Huh, looks like a lot is being betted Sanji: swooning over Nami Nami: yeah it does Robin: Mhm