I agree that BTC is the best cryptocurrency now and maybe also in the future. But if we consider the profit, I think ETH will be bigger than the BTC. It's not too hard for ETH to reach $500 while I don't think BTC can easily to reach $12k. So I think convert BTC to ETH is also a good option now.
I completely agree with you. Recently, Ethereum has been declining in price too much and now it has a much greater potential for further growth. All the more soon will be produced hard fork and it will push the price ETH high up. I think, by the end of the year the price of ETH will reach 1000$.