I would like to create a feature idea about numberless cards:
There is an interesting trend nowadays that banks like BBVA or Zen.com offers among others that are cards without card or security numbers, only the name of the owner and I think would be an interesting feature that I would gladly use.
Also some of them also offer dynamic CCV that changes around 10 minutes and can only be checked at the app.
More about it from the Mastercard website: Four Facts about the Numberless Physical Card from Mastercard | Mastercard Newsroom