Doctors who are already in practice will drop out of insurances, move to hospitals to work for a salary, or accept cash only.

FORBES: Will Your Doctor Quit? Obamacare Foretells Mass Exodus From Patient Care

The demands for cash post-Sandy have come from customers who have fewer withdrawal options thanks to power outages and storm damage, and businesses that are accepting cash only due to communications woes that leave them unable to accept credit and debit cards.

WSJ: Scramble for Cash In Sandy's Wake

IMF's cash is no longer the only form of reassurance the markets will accept.

ECONOMIST: Brazil, Argentina and the IMF

You'll need lots of cash (there are no ATMs, and only a handful of hotels accept credit cards), a yellow fever vaccination, malaria preventatives and bug spray.

FORBES: Meet the Relatives

MasterCard has helped iZettle enter the UK market as we know that enabling small businesses to accept card payments will stimulate more business by addressing the restriction of customers paying only with cash.

ENGADGET: iZettle launches on EE, aims to let UK merchants dabble in plastic