This is just my opinion guys but I think bitcoin and crypto general are currently most used is gambling purposes. Sportsbetting, poker and other card games, dice and roulette are places where bitcoin shines. Try also looking on the signatures/avatars surrounded here in our forum, major postion of it are from gambling websites.

Of course every area you could imagine because fiat was already there very long time ago before btc is born . Remember that fiat is the main choice and crypto is still an option (at least for now).