As such, to help maximize potential player winnings, we included online casinos with high RTPs. High RTPs – When playing real money slot games and other casino games, it’s always more appealing when the RTPs are high.We wanted to find real money online casinos that offered a good mix of table games, real money slots games, card games, bingo, and more. Online Casino Games Variety – One of the first things we always look out for is online casino game variety.Ranking Methodology: How We Ranked Casino Sites Best bitcoin and crypto casino – 7BitCasino.Best casino site in UK and Canada – PlayOJO.