I think it is definitely worth investing in ethereum. This is one of the best developing projects. The investment will definitely pay off. But I would not invest all my money in one coin. It's better to divide into several others
of course very valuable and will be profitable later for us if investing in ethereum. I agree with you not to focus on just one coin, it would be nice to invest in some other coins that have potential for the long term, because on the other side ethereum is still a lot of coins that are not less good if we choose to invest. so later the results will get bigger and time we use to wait in order to take profit also not too long.