If you get some knowledge about cryptocurrencies, you would know that bitcoin and ethereum are no competitors, they are two different kind if cryptocurrencies. Bitcoin is a currency who is just made to pay. It has a very high value and it will be always the most valuable cryptocurrency. Ethereum is a smart contract blockchain plattform, which you can use as a computer to develop projects on a blockchain who is available everyhwere. So if your smart, you invest in both of them.