Before you panic, do not be lazy and find the price of these coins on the ICO. You may be surprised that there is still a plus investor. What you bought at a more expensive price - the risk of investment. No one gave you a guarantee of profits. Look at the history of the cryptocurrency market from 2013 to 2017. There are a lot of interesting things. The market has been falling for much longer than six months. Be able to wait if you believe in blockchain technology and cryptocurrencies in particular.