The goal isn't to "kill" the coin entirely, the goal is to reduce the amount of mining by 99% or more. And that's an easily achieveable goal. See Ethereum Class

The goal isn't to "kill" the coin entirely, the goal is to reduce the amount of mining by 99% or more. And that's an easily achieveable goal. See Ethereum Classic which only uses 1% of the resources of Ethereum because of how low its price is.