Currently the cryptocurrency market is going through a big correction (especially to those who have recently joined). We are seeing coins lose 30-50% of its value in a few days and everyone is panicking. These are the times that will define who will succeed in this market and who will fail. You have to keep your emotions in check and be confident that once you have done proper research in the coins you have invested in they will go up when the market rebounds. Corrections are inevitable and is needed for the overall market to grow. So if you are feeling overwhelmed by the drastic decline in your portfolios just take a few days off and enjoy some sunshine. If you want to be aggressive throw some more fiat into the game and take advantage of the low prices.
you can do only two options to hold and buy again to increase the available availability. the main point is not to sell your coin you have in cheap price. patience is the key to your success.