I think this is the first time I've thought it would be useful to have a device like the ill-fated Coin. Not that I keep money on prepaid cards, but if I did, i

I think this is the first time I've thought it would be useful to have a device like the ill-fated Coin. Not that I keep money on prepaid cards, but if I did, it would be nice to back up my cards at home so that if stopped by the police I could pre-emptively delete the memory of the meta-card.