In the following year ETH will overwtake BTC as the number 1 cryptocurrency. I would dump your bitcoin while despite everything you can. 
I do not think that will happen. Though the price of eth will goes, it will still be the follower of btc for a long time and the price of it is not so good. It is a good idea to buy in more eth now, but I think younshould still hold your btc to make your inestment safe.