Most coins have lost 50 to 80% of their value, many tokens that were financed with expensive ether may now have their funding reduced due to their holdings. Do you think many of the ICOs have sold their ether and bitcoin during the last months? What other factors are making the market go steadily down?
There are a lot of factors but the most obvious one is the price of bitcoin being down, since all of the coins in the market follow the price of bitcoin then it is only norma that the prices of the coins are down now that the price of bitcoin is down. The best way is to buy the coins that you have always wanted now that prices are down and make sure that you do not put all of your money in one place