If you're taking a long-term invest, choose ethereum. The potential of ethereum is great, I also desired to invest in ethereum and watch for its worth to increase. Bitcoin is much better for a temporary investment, pump motor and get rid of, but it is too risky due to the higher volatility of bitcoin.
There is better and less known than ethereum in my opinion. If you wish to gain big ROI, you need to research a lot and find the gems
