It is not difficult to choose a good coin, but tell me, what are you looking for? An altcoin that is already listed on exchanges, or just a good ico who is going to be listed soon?
i suggest you to take a look over ico's, they are going to give you more profit.
Are you sure? Most of them are doomed to fail, exactly like most startups. The ICO hysteria will soon fade away revealing the true intentions behind most of these projects. Obviously some of them are also very honest and have a true chance of thriving. But I always prefer to bet on already well established projects.
For instance DMD has been around since Q2 2013, has a serious and committed dev team who has already proven to deliver real results.