Personally I think I'd prefer to be attacked digitally and have some protection about unauthorised transactions from my credit card company. Identity fraud however is not pleasant.
But I would rather that than to be mugged at knife-point because people holding large amounts of cash is a quick win for criminals.
Muggers don't have x-ray vision. They can't see that you don't have cash. They're going to mug you no matter what. I don't walk around with a ton of money. If I get mugged I lose a few bucks. If you get mugged you have to go cancel your cards and go without them until you get new ones or go to your bank and deal with all kinds of hassles.
To the muggers it's all about return of investment. If everyone carries cash, muggers will find more people with cash and find it worth the risk. If no-one carried cash, they'd probably give up and try to steal bank card details from large retailers instead.
The same goes for smartphones and tablets. If they are easy to sell on after stealing, crime will go up. Making the items useless if stolen removes the incentive.
I have been mugged. I lost all the cash that was in the wallet. I phoned up my card company and they immediately cancelled the cards and replaced them within a couple days.
They typically charge the retailers a few %. That few % is also represented in the cash price as very few places these days have surcharges for credit card payments.
The vast majority of the world is dangerous. Please don't assume you are the rule, not the exception. There are half a million or more robberies every year in the USA.
Lot's of exaggerating claiming going on there in your posts. Then you position into some kind of analysis of what I'm assuming and finish with some kinda point totally lost way down five posts later in this argument. I'm guessing you like using cards. You go use them. I'm gonna use cash. I've been buying stuff at target all year and I didn't have to go cancel my credit card or worry about it having charges I had to dispute.
But I would rather that than to be mugged at knife-point because people holding large amounts of cash is a quick win for criminals.