Bitcoin is volatile. The graphs can show its development throughout the years and there are so many up and downs of the coin. But its greatest point is just this December 2017 where it reached 18k. For me, it's volatility also helps as long as it is a positive effect on the investors and for everyone who is involved in cryptocurrency. For me, even though its value is around $8,000 it is still positive because the investors can buy more and its value last December proved that it has a future. And if you are going to compare its value to other years where bitcoin existed, $8,000 is not a bad value at all.