The dearth of a central authority might also make cryptocurrencies more secure. "It is really hack-evidence mainly because there's no 1 central place of failure," points out David Donovan, govt vice chairman at Publicis Sapient.??? ??? ????? ????? ??? ??????? ????? ???? ??????? ?? ???? ???????? ??? ????????????? ????? ???????, ?????? ?????? ?? ????