RE: HNU depends if you are overextended, or short on cash, or on margin that leads you to needing money immeditatly. If not, you might want to ride out the bad waves, as everything with ng is cyclical, and like the last crash that happend, a correction upward will happen again. Only thing we don't know is when it will be unfortunatly.
If you have free cash available though, might want to consider trying to play both sides of the coin. You cant really lose much at these levels provided you are not buying crazy amounts of shares, and can possibly get some quick in and out swing trades due to the volitility that persists
GLTA