I choose both. eth and btc are two profitable coins. no matter what the market will be like in the future, holding onto both is the best option. for me these two coins are not to choose, but are must-have. So there is no reason to sell BTC or Eth just to hold onto one of them.
That's right, I really agree with what you are saying because considering that both of them are good to have, moreover, both of them often have good potential every year, sometimes even market conditions are also determined by the collapse or rise of Bitcoin.