Keep calm and don't panic. Now is the worst time to sell your coins. The prices are so low that the coins bought by you at a high price will bring you huge losses. Try to look at prices no more often than once a week. If there is another rapid growth, then you will hear about it and have time to join. But now give yourself a break and don't torment yourself with constant questions about what will happen next.
I also don't know for sure what will happen next. I just believe in crypto currencies and the fact that they just come into our lives. They will not disappear anywhere. So wait a bit and the prices will start to recover.