Just hold, don't sell unless it's necessary. With this wholew ETF story some people have begun to panic and sell but without reason. We have witnessed some minor dump or better to say correction but Bitcoin price is on the way up again so you will profit the most by holding coins.
That's the problem of bitcoin investors , most of them are scared when the price even drops 20$ thinking that bitcoin is over and the price is failing but they don't understand there will surely be dumps in an investment like this. Plus that freakin china is simply creating more tension among the investors.