I just came across this thread...

Bitfinex Hacker of 120,000 Bitcoin Sentenced to 5 Years in Prison

The hack happened back in 2016.. and even though the stolen Bitcoins have been recovered, they’re still in the government’s possession. Just recently, the hackers were sentenced, but there’s still no clear timetable for when the funds will be returned to the exchange.

If we relate this to the casino context, a similar process might apply. It could take 5 to 10 years before the funds are recovered if the hacker will be traced, so a casino must have a solid buffer in place. That way, in case a hack happens, they can continue operations with little to no disruption. So Metawin really have manage that risk effectively.