What's more addicting between the two is, I believe Slots, although I'm not that "addicted" to it. But merely as a comparison with sports-betting, it's Slots.

But what's truly an "addicting" form of gambling, IF you ask me, is "trading" shitcoins. I could play in a casino in Craps for a maximum of two hours before I get bored, BUT shitcoin speculation? During my early days in crypto before adopting a HODL strategy, I couldn't stop checking the prices of shitcoins every minute.