Bitcoin is known as the first and the best crypto currency while ethereum is considered the second best  crypto coin. Bitcoin has been in existence before ethereum and it has gained enough trust and popularity among users to the extent that it is the most invested in coin in the crypto world. Ethereum too has gain a lot of popularity recently due to its possession of smart base contract functionality used by many ICOs. So both coins has a great tenancy , just that bitcoin is the best between the two. When considering their price, you will see that bitcoin is of the highest price while ethereum price is cheap. So high price increasing rate of bitcoin every year has make it a darling Among investors to the extent that majority of investors considers bitcoin first when they want to invest in crypto currency. So bitcoin is the best of the two.