Anonymity and popularity of Cryptocurrency are two of it's the best attraction.
And Cryptocurrency games are more transparent.
Will, there comes a time that all online gambling sites will be Cryptocurrency based?
It might and might not come . It depends on the company itself if they are willing to opt for cryptocurrencies.
Pros:
1. Privacy
2. More diversity
3. Transparent network
4. Transactions stay in the network for eternity, can be verified anytime by anyone.
Cons:
1. People generally will have to pay fee while sending cryptocurrencies
2. Not that recognized and established by the government
3. Possible scams
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Crypto gambling is a emerging industry which is as old as nearly cryptocurrencies themselves , the casinos and faucets have been there since long therefore I do think if we consider the situation after 10 more years we will be able to see some more innovations . I am already baffled by the scope and the amount of diversity in the gambling section related to Cryptocurrencies.