I think fluctuations and volatility in terms of value of digital currencies are one of the primary property that makes this innovative financial technology interesting and popular to the public.
Some treat it as negative, but others just enjoy it. It would seem that the value of other altcoins are somewhat connected to the supply and demands of bitcoin in the market. Until now, the price gap is still big, but it does not mean that they are not helping the progression of the technology to become big time competitor in the future.