Agreed on your point, it's also very clear that the prices of Bitcoin affect ETH and i think that ETH may not meet or over take Bitcoin now or in the near future.
Ethereum’s purpose is to offer and run decentralized smart-contract applications powered by blockchain technology that do not go offline and cannot be altered. It provides users with a platform and programming language to build the applications on. while
Bitcoin’s purpose, however, is largely different. It serves as a decentralized store of value — a peer-to-peer digital currency, used for financial transactions. It eliminates the need for third parties in payment technology.