Recognition of other altcoins would entirely depending on the house if they do saw that theres a public request on adding it up then they might consider it.
I would not play with crypto because I know its worth in future would be a lot more than what it is today. So if I have to play it would be with money because its value would be decreasing in years and even I lose it would be money and not crypto.
Yes, you are right we should not gamble with the crypto because it has very huge growth in the coming and it is always good to gamble with the fiat currency instead of cryptocurrency. Because fiat current will not change the value but cryptocurrency will change it's value.
Well you still can use crypto though for gamble, you can use bitcoin, ethereum or other crypto on online gambling. So even cryptocurrency is not yet legalized on your country, you still can use it for online gambling.