Altcoins bave been through this kind of situations - there's a point where altcoin price drop drastically, and then go up the other day. One reason about it is explained by the law of supply and demand. When people don't sell their altcoin, the price of that certain altcoin will probably stable. Once that a number of holders sell their coins  but only few buyers buy (meaning, there's a huge amount of supply), the tendency is the price of that altcoin will go down. But if most people hold on their altcoins and a lot of people are looking to buy (meaning, there's a high demand), then the price would probably go up. Remember that this is just one case of why altcoin price is changing. There's a lot of possible reasons for that, but this is the basic in the world of economics.