yes for now, because in my opinion investing in top ranking is safer and the price will definitely have a greater chance of increasing compared to I investing not in the top ranking, therefore I am now investing in ETH, because I believe that the price of ETH will definitely increase and give me profit compared to I choose to invest that is not in the top ranking, because the risk is greater.
Yes, it's worth to invest already having potential to grow it's market value in where we can secured to get profits. In ICo it's often scams and nothing to expect at all but for those listed in market there will be more on growing.