Currency..Money transfer system can't be run without Gov backed.. While computers.. Websites are vulnerable things..Even Pentagon security system was hacked. Pakistan credit card Banking system is recently hacked.. WikiLeaks.. Panama leaks..there are lots of examples..I think in future peoples will trust on solid..hard money.means real money....papers money only have valued if it's backed by hard money..like Gold.. Diamond or others forms of hard money... Bitcoin or others currencies be good if it's backed and insured by Gov.. legalised.. accepted international banks..systems..