When investing, Im a big fan of diversification of portfolios. I believe that both Ethereum and Bitcoin offer value, albeit in different ways.
Even though Ethereum is positioning itself to become a large platform, the fact that Bitcoin is so well known makes it the first place where people invest.
Not likely, I have tried this and I don't feel good because with the bitcoins that I had before I could buy now more ethereum.
I'm saying this because the exchange rate has been decreased too much and it's not the same as before and you will lose.
I think it is precisely because of the fact that now you can buy more ETH with your BTC that makes it more attractive to make the purchase, if at some point the price of bitcoin gets lower and the price of ETH keeps strong you could easily now use your Eth to buy bitcoin and get even more in return, and even if that does not happen ETH is a good coin to hold so it is not like you are holding a shit coin.