Bitcoin price has dropped significantly since beginning of 2018. This is an opportunity to buy bitcoins and sell later as expects project the price to hit $20,000 late this year.
Maybe or maybe not. Because bitcoin price now $6800, its price dropping and pumping in this two months. And we can't think what will do in future. But we know about past. It was so happy result. If the trend continues, then the price will increase.
Bitcoin price falls and no one knows how much it will fall. Of course, this creates an opportunity to buy, but whether the price will reach 20k $ this year is a very optimistic prediction.