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
In my opinion, I think that gambling with any cryptocurrency that allows you to stay within a budget is okay. Sometimes if you choose to accept or gamble with Bitcoin, particularly based on the fluctuations in its value, it may exceed the specific amounts you wish to gamble with because the Bitcoin at that time increased in value. It may not be something serious for someone, but if you think that's a problem for you, then you should use a cryptocurrency that you know you're okay with, it still counts.
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. Since yesterday I received my monthly bonus, I chose ETH and made a bet, if I get it right I'll withdraw it because I need ETH