How Safe Are Internet Casinos and Sportsbooks?
How safe is anything. So far there have been almost no problems with casino payouts and deposit security, but that is not to say there will never be. Many of the jurisdictions require that the licensee posts bonds of cash or insurance as part of the license requirements.

As an example, the groups licensed in Curacao have to post an amount of money equal to the average win in a special account in order to guarantee that they can pay winners. To even get a license, those who apply have to go through some extensive government checks.
Your personal security (including credit card details and other personal information) is also guaranteed under license agreements in many, if not all, jurisdictions. Most casinos and sportsbooks use secure servers to conduct all of their transactions, and all information about you is held offline. Many also take out insurance against fraud.