Ethereum might be a better investment for the simple fact that is has a much smaller market cap and better technology. If you are looking for the more consistent, safer cryptocurrency, Bitcoin is a better investment. It all depends on what you are looking for. But nowadays, ICO is the better option for investment because it has good returns in terms of money. ICO's are risky for investment. Most of the ICO's are scam or fraud. So, before investing in ICO verify the authenticity of the platform and tokens.