Ethereum will grow even better in the future, but being able to do bitcoint as number 1 seems to be still difficult, and in the future, ethereum will be more widely known and more and more to invest in ethereum.
Neither bitcoin will down Ethereum nor will Ethereum reach to bitcoin. There is a huge difference between the prices of two coins. It is not possible for bitcoin to drop more than $6000, because the mining process will stop and we will find no coins in the market, and $6000 price for Ethereum is a big price and may it never reach to this price. Its investment cap will stop.