In order not to panic, first examine the market movements so that they are trained and avoid the risk of loss, and most importantly, don't be greedy.
Panic is usually done by newbie short-term investors, the market situation has to be evaluated and must be monitor closely so the timing is achieved. For long term investors, we don't need to sweat it out, just read the news and know the reason why the market dump, if it will not result in making its future look bad, then we just have to relax and wait until it rebounds as FUD is normal in the space.