Bitcoin prices have never been so low this year. Prices were down to 5,826.41$ (Jun 24 2018 16:04:00 UTC). Many advisers say that at the end of the year it will hit 30,000$. The market is seeing more than the fall from the price rise. Imagine when the speculation will end?
That is the other side of the fact that they are volatile. Lets just accept the fact that they are really like that and they Will never change that. And besides the price if the bitcoins are said to be depending on the activity of the people so maybe this year there are a lot of people sell their holdings rather than those people who buy. Knowing the fact the this is a great chance to get inside the bitcoins the people are putting their moeny away becquse of some bad rumors about it.