If you go to the cruise line website-in my case Carnival-you will see that they recommend you use a different card from your sign & sail
card to use for your safe, etc. Any kind of card with the strip on the back will do. ANY card. I have a hotel card that I will be using. This way, if my S&S card gets stolen, I don't have to worry about the valuables that are safely locked away!
DON'T use your sail & sign card to do this!
Would you be back on this board if the cruise lines granted your wish & let you use cash for EVERYthing & THEN YOU GOT MUGGED!!! Would you blame the cruise line because you had to carry ALL THAT CASH? One wonders.