BTC has been very resilient, I can't see anything dethroning it. Not even the Bcash (Bitcoin Cash) attack. It is just a few rich people (Roger Ver and Jihan Wu) that are pumping BCH. Soon the tower will topple and BCH will be heavily dumped. Let's be realistic. BCH is not as good a store of value oas Bitcoin, and it is not as good a transactional currency as a lot of other very good alt-coins. Bitcoin is Bitcoin because it has survived a number of attacks on it in the past and just gets stronger after every failed attack. This attack will also fail. Keep a lookout for new Bitcoin all time high prices by the end of the year :)