The popularity of cryptocurrency casinos can vary over time, and it also depends on various factors such as user preferences, promotions, and overall reputation. However, here are ten popular cryptocurrency casinos in 2021:
1. Bitstarz: Known for its extensive game selection and user-friendly interface.
2. FortuneJack: Offers a wide range of games, including live dealers and sports betting.
3. Betchain: Offers a variety of casino games and has been operating since 2013.
4. mBit Casino: Known for its generous bonuses and VIP program.
5. 7Bit Casino: Features a large selection of games and provides 24/7 customer support.
6. Stake: Primarily focuses on provably fair gambling and offers unique game options.
7. Cloudbet: Provides a sportsbook and casino, and is popular for its high betting limits.
8. Bitcasino: Offers a wide range of casino games and live dealers.
9. King Billy Casino: Known for its user-friendly interface and extensive game collection.
10. CryptoWild: Offers several cryptocurrency options and a VIP program.
Please note that the popularity of cryptocurrency casinos may change over time, so it’s always a good idea to do thorough research and read reviews before choosing a platform.