Every coin with its uniqueness and place in the crypto market. Bitcoin is the king of crypto currencies, number one in ranking, has the biggest price in the crypto market and has a big trend in the nature of the market trend(either upwards or downwards). Bitcoins popularity has made the crypto world widely open for everyone to see, come in and join the system. ETH making the smart contract technology, made an easier way for new projects and coins to come in and have a stand in the crypto space. ETH is and has been the second in crypto ranking.