If it is my advice, do not sell all the altcoin you have. Which if potentially rising the price should just hold it first. But if the coin you have is not so good your prospect could have sold it before the coin price died. All decisions are in your hands. That's it from me.
These days are not the period when you have to sell something. You should better get more altcoins that you trust and hold them for several months. This strategy will give you the best possible profits.