Yes. Ethereum is a highly advanced cryptocurrency with features such as Smart Contracts, and more. It may be one of the reasons why it is the second most popular cryptocurrency on the market, leaving it closer towards reaching Bitcoin's market cap, each time the price rises. At current levels, it may seem impossible but if at some point in the future, ETH's supply would become limited, then it may probably overcome in Bitcoin in market cap, if the pioneer cryptocurrency doesn't manage to solve its scalability issue soon.
Litecoin is another great altcoin which has gained a lot of traction lately, due to the fact that it is getting closer towards SegWit activation. It would only become a matter of time before it activates, and makes this coin skyrocket in price. As for Dogecoin, I don't rather see it increasing in price too much, but instead it would increase in usability as the same is inexpensive and easier to get, not to mention its fast transaction speeds making it ideal for tipping others or for social media payments. Since there hasn't been much development nor innovation for these last two cryptocurrencies, their future is uncertain, but as long as they're active within the community, they would be worth the shot. Just my opinion.