Why is verge going down and wonder if I should sell my coins?
You know everybody will disagree with you selling coins at these current dip. But its your decision, maybe you got your coins for free so there is really no loss for whatever price your coins be sold. But if you paid for those, make sure you can till get your capital, if not just wait until the prices are stable again.
Naturally, in comparison with December 2017, Verge price is VERY low now, but this coin is not the biggest loser. If you did not sell it before, it is useless doing it now: you will lose much more. Just wait a bit.