The website is 888tiger.com...
I hope its not a scam...but it doesn't really matter as much anymore because my stupid ass lost a fair amount of the money now

(but its still worth more than i deposited...)
I was hoping to withdraw the money as bitcoin (it seems like the simplest way to invest in bitcoin) and then just deposit a little bit back on but its looking like if it is a real casino, i'll end up just putting it back in and hoping I can get it up to something worthwhile.
The website you are talking seems legit but their withdrawal is not instant it will take 7 business days after the confirmation and also they have a minimum withdrawal limit so if your BTC amount is lesser than that you may not withdraw it. But casinos and any gambling methods are not really an investment, if you want you can invest in the gambling sites bankroll and choose complete crypto gambling sites if you wanted to invest.