When investing, Im a big fan of diversification of portfolios. I believe that both Ethereum and Bitcoin offer value, albeit in different ways.
Even though Ethereum is positioning itself to become a large platform, the fact that Bitcoin is so well known makes it the first place where people invest.
Hey you know that bitcoin is the most famous crypto currency in this time and it is well known to all. It has a great value and it will be increasing. Just hold your bitcoin and watch the price. On the other side Ethereum has more popular for ico platform. I think it has also a great chance and a bright future. You can convert some of your btc to eth and rest of your btc for holding.