Crypto currency, the only currency you can loose everything with a decent sized magnetic pulse or a country can go broke. Seems kind of stupid that you can loose it all or people having a hand cut off to get the chip in it since cutting it would take to long but chopping the arm will be safer for the chip and the persons broke and no hand so they're just as good as dead with no chip to get into a hospital if no one lets them in or call the police or do anything at all unless someone else jumps in.