Honestly, the problem we are seeing right now is that all the alt-coins are rising fast, which means people are moving their money into them, which to me is a problem because that means people are, for the most part, solely investing in these projects as fiscal investments, likely to withdraw into the fiat of their choice.
For any cryptocurrency to remain strong in the long term, it has to be more than just "get rich quick". This process has been so rapid that I am certainly concerned about how this will play out. At least Bitcoin itself has been more stable.
Here's a useful site:
http://coinmarketcap.com/