I think many more good coins will also gain momentum in their prices.Not only ETH or Dash, i see product based ICO's will definitely be motivated and also see good returns on them in the next few years. I still feel ETH is trading in its early ages and has a long way to go , so in the case of ETH i will be patient and wait for the prices to reach resistance. In case of Dash, growth would be little slow compared to ETH, this is only my prediction as ETH is based on grt technology.
I beg to differ with your idea that ETH is slow, right now ETH is witnessing some good actions, espasialy with the ICO's that are being created, which what makes etheruml the next big currency after the bitcoin, in my opinion the customization and being able to create your own coin, is what makes etheruem a good currency, it might not reach high prices like the bitcoin but the number of poeple that will be using is what is going to make it a valuable thing to have, and that is the problem with people's visoin they are blinded by thier greed and they go after a coin just because it has high price not because it has a good concept, they use cryptocurrency not as they are intended to be, they use them for investment.