Some cryptocurrencies share a blockchain, whilst other cryptocurrencies operate on their own independent blockchains.???? ??????? ?????????? ?????? - ??? ???? ??????? ???????? ??? ??????? ??? ?????? ?????? ????????? ??? ??? ????????? ???? ??? ??????????? ???????????, ??? ?????????? ?????? ?????????? ????? ????? ?????? ??? ???????? ???????.?????????