as for me there is no any difference what kind of cryptocurrency you use for gambling. yes, BTC costs a lot but also your rewards will be in BTC.
Sorry, but you don't get what OP's post is all about.
It's the expensive transaction fee every time you deposit, and I can really agree with that as bitcoin network now congested, the fee is also higher.
We can gamble with altcoins and then trade it with BTC, that would be easy, but winning is really hard.
I just tried doge transferring to other exchange and it's very cheap in transaction fee, I hope all gambling sites will add this coin.
Transaction fee is not too much expensive to be honest,recently the transaction fee cost about $2 for sending $350 of bitcoin which is still pretty okay for most of the gamblers.Coins like doge is also good when people want cheap transaction fee but it will get too much expenses for them to increase and maintain the security measure for each coin so as long as they have less coin the site will be more secured.