I disagree, because 1) most people will call their credit card companies within hours, if not minutes, after their card is stolen to cancel it and have one with a new card number issued; and 2) credit card purchases can be easily tracked. If you're talking thousands of dollars in fraudulent purchases (enough to make it worth the effort), police can find the thieves through security cameras and mail order records.

I think cash is still king as far as most thieves are concerned.

A Social Security number and driver's license, on the other hand, could be valuable, since then a thief can commit identity theft. He/she can open up new credit cards in the victim's name and have them sent to a different address so the victim won't find out, or sell the SSN to illegal immigrants and others. But the good news is, most people don't carry around Social Security cards so this type of theft is probably less common.