The dearth of the central authority might also make cryptocurrencies safer. "It's hack-proof for the reason that there is no just one central place of failure," describes David Donovan, executive vp at Publicis Sapient.???????, ?????? ???????????? ??? ???? ?????? ????? ??? ????? ????????? ??????!: ??? ???????? ??? ?????, ??????? ?? ?????????. ??? ?