Yes. Maestro is as secure as any bank card gets. It is up there with VISA and MasterCard, so you can make transactions without worrying about hackers, frauds, or your information being leaked to third parties. Maestro has also been around for years and is backed by your bank. You can use it to make purchases online and offline, including at gas stations, and supermarkets. However, you still need to find a secure gambling website that has enough measures to protect your sensitive information from unauthorized access.