Is cryptocurrency a bubble?

In hindsight, it would appear that the huge spike in cryptocurrency prices at the end of 2017 was a bubble. As of the middle of 2018 prices have come way back down yet are still going through periods of extreme volatility. Is it still a bubble? No one really knows although many so-called experts claim that cryptocurrency is and will always be a bubble until it is dead. Markets whose prices go up at a wildly unpredictable pace and which are driven by rumors, fear, greed, and speculation, rather than fundamental value are often considered bubbles. So are cryptocurrencies still in a bubble? Many think so and it will continue to be a bubble until it reaches a “fair” value.