In time people will become immune to FUD and the crashes will be shallower. You can already see it when you compare the charts from the last correction from the one in 2013.
Things like that take time and there's nothing you can do to make people calm down. They have to experience a deep correction, make some mistakes trading, and if they survive and stay in the game they'll become immune. I went through the bear market of 2015/16 sold some coins low because I needed money at the time, and I'm still alive and kicking. Since then I'm buying whenever I have some spare money, crash or no crash.
While I agree that there isn't much that can be said or done to help someone understand the nature of the volatility of crypto, I do believe that we can do our part in helping minimize the chaos by pointing newbs in the right direction and share relevant information to support this. I, personally, have never FOMO'd since my initial purchase, and part of that reason was because of these forums and the connections I've made from them. These influences helped guide me and show me articles about the nature of bitcoin; they even went as far as to reassure me that even though prices will drop, they are likely to bounce back. I'm glad I listened to them.
This topic isn't directed to users like you and me; we're at the point of the game now to where panic isn't even in our vocabulary when it comes to the dips and valleys... But more so the new investors to Bitcoin. The ones that likely saw a news article or segment about Bitcoin during the pump in Nov/Dec who are now listening to the news about how this is the bubble bursting... They don't have very much reference to years past, and I'm just trying to provide them with some reassurance here on the boards amongst the chaos of FUD that a lot of us higher-ranked members have come to subconsciously ignore.
Even if one person sees this post, watches the video, and decides not to panic-sell, or even post a repeated question like "will bitcoin ever bounce back", I'll be assured that I've made an impact on at least that one person. Education is one of the most important proponents to cryptocurrency, and I feel that you can never have too much of it.
