Now that BTC is back on track, the altcoins are also starting to follow the trend. The recent major dip has caused panic and to be honest, it got me worried as well. And in this situation, the best thing to do is to keep cam and hold. It's not really wise to dump at a lower price.
Remember that you will only lose if you sell below the price when you bought any of your cryptos.
Also, during the recent events... I also learned that there are coins that don't necessarily follow BTC in terms of price trends. There could be a correlation to a certain extent but not entirely true. There are coins that dip slightly while there are coins that even went up in terms of price. But of course, there are coins that really plunge worst than BTC. If the coin you follow is one of them then it could be your chance to buy the discounted price and increase your position.
If your coin did better than BTC in the recent dip then it could be a sign that you may bulk-up even more.
By the way, don't my word for it. Please do your own research before making a move.
Cheers!