I also prefer to use USD in my bets, in some cases I use Litecoin, but I don't use bitcoin, even when the rates are low, I still don't use bitcoin in my bets. I prefer to keep a certain difference between the funds allocated for my bets and the funds allocated for trading and hodl. Also because I don't see gambling as something that would give me profit in the long term, playing with bitcoin, I would be running the risk of losing bitcoin
Some time ago, I forgot to deposit in USDT and I made a deposit in Litecoin to play on Stake, it was $15 in Litecoin, I bet on some games and I managed to win, I ended up with $30 in Litecoin, at that time the price of Litecoin was $135, then the price of Litecoin started to fall a lot, from $30 in Litecoin, it was $23
When I got a bet right and had $25 in Litecoin, the price of Litecoin would fall to $105 and my bankroll would fall to $17

I really regret depositing in Litecoin, that's why I'm being very careful not to make the same mistake, now I only bet with USDC or USDT.
A lesson learned, and thanks for sharing, because some gamblers may never understand why people only choose gambling with USDT and not other cryptocurrencies. If you must gamble with other cryptocurrencies, prepare your mind to be affected by the value fluctuations so you don't make it into a case with the casino.
Imagine winning $50 and then coming back to see $39 because of a value drop in crypto used; you may think the casino has deducted or tampered with the amount you won.
I will call it Kingcoin.