Many people think that they should invest in BTC, and I choose both. ETH is being developed very well by their team so there is no need to be shy about investing and it.
Everyone should have both bitcoin and ethereum before other alt coins, these are two most popular and known cryptos. Very active development and always upgrading, but I will choose bitcoin, I am here because of bitcoin. Trying to sell bounties to get more bitcoins. It is future.