The dearth of the central authority may make cryptocurrencies safer. "It is really hack-proof due to the fact there's no one central place of failure," points out David Donovan, government vice chairman at Publicis Sapient.Τη σήμερον ημέραν, τα κρυπτονομίσματα έχουν μετατραπεί σε ένα παγκόσ�