I suggest not to do it. Converting your bitcoin to ethereum is a bad idea because these two coins are highly stable coin in the market and worth holding. If you have enough money in your pocket why not buying another investment like ethereum? And if you dont have enough money, better to stay in bitcoin because it will give you profit.
Why? I think its not bad idea because now etherium os still lower price and much chance to make money with etherium.
Bitcoin also very good coin but the chance to increase double price is very difficult. So etherium will not be bad idea.