There is nothing wrong in investing into multiple coins in as much as those coins have future prospect. The whole decision depends on what you want from your investment. In my own opinion, I will advise that you take close study on those coins very well before you invest your money into it. Try to find out what  the prospects of those coins are before you invest in them. Also, I will suggest if you can start with little coins and see how the profits will be before you think of investing in more other coins. Investment in coins that are of future prospects is a very lucrative business to venture into.