The advantage of a modern online payment system like Revolut is that you are in control. Via the app, you can see what happens to your account and Maestro card(s). Every payment is logged and you’ll receive a notification. If you do lose your card you can simply freeze or lock the card via the app. Much easier than with a traditional bank.
Security is key for these modern online banks and the same goes for Revolut. They safeguard their customer’s money by keeping it separate from their own money. In the unlikely event the company goes belly up, your money is always safe as it is stored outside the company.
And there are heaps of security features built-in their app and systems, for example, 2-factor authentication when you want to transfer money.