I would like the feature to change my digital MasterCard number whenever I need to. The most I would need to change my digital card number would be once per day. This is extremely helpful in canceling subscriptions that I forgot about. Apple Card and Oxygen Bank have this feature but there is no crypto debit card that does. I have been in a situation where my card was locked, I unlocked it, and I was charged for the subscription the second I unlocked it. I would use this feature often and I assume many others would use it also.