In general, 0.001 BTC is a norm that many websites adhere to right now. Each online gambling facility has its own set of standards. Progressive Bitcoin slots, on the other hand, need a larger wager than regular slots. At the same time, Bitcoin's unpredictability is a key component in calculating the minimum wagering criterion. Every BTC casino has a different limit for progressive bitcoin slots, and you can check these from the rules and regulations section or wagering requirement section.