Try to hold on to your bitcoin because it already happened a lot in the recent years, yet bitcoin price recovers and even increased it's price. Bitcoin price is volatile so you should get used to it. It would be your loss if you panic and withdraw your bitcoin, instead of panicking, it's best to buy bitcoin when price is going down.
For the people who are not get used to trading yet, it is better to hodl because sooner or later, bitcoin would go back up because it is what always happened before so there is nothing to worry. For the traders who are already familiar with this scenario may take advantage of the opportunity to short bitcoin which according to some is more profitable and others would shift to USD or USDT to buy back lower. I am just a newbie in this world of trading that's why I prefer to just hold because I don't have that much coin so if I shift to other digital currency, my gain if ever I buy back lower would just be eaten up by fees. But sooner when I am confident enough with my trading and have substantial capital then I would take the opportunity of trading when it goes down not just holding so that I can take advantage of it wherever the price will go.