I really believe that Bitcoin will continue to dominate the cryptocurrency market by 2018. Currently Bitcoin still has the largest market capitalization. Bitcoin is still the king of the altcoin, all altcoin are affected by Bitcoin. It's very popular and there are lots of big investors who are holding Bitcoin. I believe in the future, Bitcoin will grow stronger, maybe by the end of this year Bitcoin price will be over $ 20000. Ethereum is also the queen of the market. It is the foundation of many ICOs. Actually Ethereum has great potential. However, if Ethereum wants to pass Bitcoin, then Ethereum will need a lot of time and must grow stronger.