It's not about you being copied and destroyed. It's about of continued consciousness. You are continually being killed and replaced by neurons dying off and others replacing the function. The problem is getting the information off the neurons without copy and kill. The key would be continuous transfer of neurons over time to a more longlived replacement. So you is still you and not you thinks it's still you. Also... It's up for debate if that matters as you are still a copy if you do nothing. But it solves the continued consciousness problem.