in 2018 bitcoin slightly reduced because of the many news that make panic selling. which makes the bitcoin broken. I think by the end of 2018 it will get better, with so many requests.
hopefully.
People were expecting that bitcoin price will too much increase in 2018, but up to no nothing is proved as correct, bitcoin price creases about 14000$ that is a big decrease in bitcoin price. But still most of the investors are too confident about bitcoin price that at the end of 2018 the bitcoin price will very soon recover and will continue increasing because still people want to invest money in bitcoin.