Bitcoin and altcoint fluctuate where market prices go up and down at any time, but you can prevent price reductions by holding prices down! Do not get involved in the wrong problem and make you sell below your purchase price and obviously hurt yourself and the other coin owner ,, keep enduring and the price is definitely going up !!
Decreasing of prices does not really matter because if you really knew how the market works then it the price will obviously increase again after a few months and all you need to do is be patient on waiting in order not to lose a huge amount of profit.