What coins should you expect to see at Crypto gambling sites?

As a keen observer of the cryptocurrency and finance industry, I'm curious to know which coins one might typically encounter at crypto gambling sites. Given the volatile nature of digital currencies, I'm wondering if there's a standard set of coins that are commonly accepted for wagering. Are we seeing a predominance of Bitcoin, Ethereum, or perhaps other emerging altcoins? I'm also interested in knowing if these sites tend to accept a wide range of coins, or if they're more selective in their choices. Understanding which coins are prevalent in this niche market could provide valuable insights into the overall trends and preferences within the crypto gambling community.