Casinos have very different money making model to any exchanges. They are not exchanges for a reason. If you gamble with BTC you win btc and you withdraw BTC, that's it. You don't change BTC to usdt and try start a bank run.
And FTX used their own token as a collateral which was one of the reasons this happened to them. And i am not sure what kind of numbers in those reserves would make you happy? One that includes enough reserves for everyone winning for a week for every bet or what?
OP is right, I saw that most people are saying things like: "I don't care because the casino has been on the market for a long time and they are reliable" but actually what OP is saying is something very serious and he should be implemented by all casinos, for example: if a casino states that it has 20 million dollars in reserve (this money will no longer be included in the casino expenses), that means that people could follow it closely whenever that value oscillate (increase or decrease) and this guarantees that customers will have money to withdraw because the casino's finances are healthy, if for example there is a scam accusation in which someone complains that he is not managing to withdraw 5000$ all people will see that the casino has money to pay so the case is not about the casino not having money to pay, there may be another reason
for me actually it doesn't really matter (for me).
because a gambling platform site that already has a good reputation, there is no need to doubt how much reserve fund they keep.
maybe you can see from one of the gambling websites that are able to pay for every ad they display at any time and gambling parties are able to pay 1-2 BTC just to pay for advertisements. so there is no need to doubt how much reserve fund they have.
Ps : don't equate a gambling platform with an exchange like FTX
but you need to start worrying about it, look at the case of 1xBit.com who are scammers, they make selective payments in their casino, but if all casinos had to show how much money they have, maybe we would find that this 1xBit.com casino they are bankrupt, so nobody would be using that casino and there is also something else and if a casino showed that it only has 5 million dollars people would avoid using that casino because they would already know that the casino is really surviving poorly. OP's idea is very good and would solve many problems