Those that have bought at the peak always have two options, either to give up and sell at losses or be patient and wait for another ATH to come higher than the price they've bought example for Bitcoin. These recovery periods will take time and they need to remember that if it's something like Bitcoin, there's no need for them to worry with it because it is usually comes handy when it has dumped but then recovery will definitely come no matter what happens.
I like what you said if it's about Bitcoin then there is no need to worry definitely it will recover from it's down side but a drastical fall in some Altcoins tends to become the end story of that coin. Not Altcoins have the possibility of reaching a new All Time High after a dump most of them get rugged or the inability to stand in the crypto space.