I think, this year, the value of bitcoin has fallen dramatically. They dropped from $ 8,000 and now they are under $ 6500 for a few months. In contrast to Bitcoin, Ethereum has made good price fluctuations, its value has increased and decreased, but not at all. If in the fourth quarter of 2018, the value of the bitcoin is still in the downward range, then Ethereum may have a good momentum to become a common currency in the world.