Jong-ho: He'll probably donate it to some charity.
Jung: Spend it all on food and clothes.
Bora: Buy a sword probably. Some self help books. Or, she'll just spend all her money at the bar.
Seo-jun: Buy some really cool glasses.
Force: Actually buy a shirt for once. Or maybe a good car, or a better hideout.
Toothless: (he's not a dragon) spend it on himself. Clothes, riches, you name it.