There is no need to panic whatsoever! Why would you panic if you hold for the longterm? Especially when you hold projects you really believe in. For example one project I hold is DeepOnion it really has great features such as tor integrate. Why would I ever want to sell this altcoin if i know it is going to be great in the future? No need to panic really...
maybe people out there need to learn more about bitcoin and need to know that they don't have to panic and it is better if they learn about manage their feeling too so if somehow there are a bad things that happen for example, the price is down like yesterday, they can calm down and just wait for the price increase back. I think they need to know that not every news will give a good news but some of them will try to make people to gets panic and finally they will sell their bitcoin because of the price is down.