I think some of the old business liquidate some of the BTC they hold especially when the markets plummet, or they just convert it to stablecoins to keep a float during crypto winter. So each new cycle of new all time highs does not necessarily mean that their BTC value grew by 10 or 7 times
Isn't it risky to convert crypto reserves into stablecoin for a casino business? You never know when the price goes up or down. If the price goes up, you'll have to buy Bitcoins with your stablecoins and you might lose a lot of money. I think that they should keep their cryptocurrencies in their original forms. If this is true, then, if they could afford to pay 10 Bitcoin 7 years ago, they should be able to pay 10 Bitcoin today. It's strange that Baryom, who wanted to increase the max bet up to 100-150 Bitcoins, actually lowered it from 10 Bitcoins to 0.2 Bitcoins.
Aside from that risk people might lose their trust on the casino especially many would provably think that what they are doing is red flag.
Also they might lose lots of money on fees if they always convert on desired coin what people request to withdraw.
So maintaining their funds to different coins is much really better since they can get away from major drawbacks and they can able to fasten up the transaction happening in their casino. Maybe they updated updated their maximum bet and base it to USD that's why they come up with those figures.