It is not advisable to leave their money in the casino because we don't know what can happen, but some people still keep their money there. Maybe if the amount is not big, it will be fine, but it can be a risk for us if it is big. But we can hope the casino will guard its site against hacking and always monitor it for possible attacks from hackers. It's even possible that gambling sites can make some bug finder for anyone who finds a bug on their site so that the casino can reward those who find it.