Between these two, I will go for ethereum. One of the most important factor one should consider before investing in a coin is regarding its utility. Bitcoin has no practical use and has a number of problems like high transaction fees. Another problem associated with bitcoins is that its price is manipulated. That is the reason why the prices dropped from $17000 to $11000 in just two months. This makes your investment very risky in case of bitcoins and ethereum is much more stable.