So you are expecting someone to deposit such huge amount in your casino and wager with it. But it the person loss all, what will be the benefit of the gambler? Any casino asking people to deposit huge amount is not a legit one and gamblers should avoid it. Casinos should make their profit gradually and not overnight.
Honestly the price is just wrong. A casino asking for huge deposits charges a massive premium just for the right to play into their edge, which is a broken model. Legit books make their money on the vig over thousands of small bets, not by soaking one player dry upfront.
It signals they can't operate normally or they're setting up for a cash grab.
I've seen this in sports betting too-shady bookies offer 'special lines' with a 5 BTC deposit and vanish on the withdrawal. Your value is zero; you're just fronting them liquidity while taking all the downside risk.
I always compare the deposit demand to the site's overall handle, and if it's off, I walk away.