I have a json file with ether created before fork. Now I want to sell ETC without moving ETH. My question is how to do it properly? What if I'll restore file into ETC wallet and spend it. Is possible to restore the same file into ETH wallet again?
To avoid replay attacks, isn't it a better solution to move the ETH funds first completely to another wallet before dealing with ETC? Or would a split be impossible after all (or some) ETH are spent from that pre fork json-file?