If you are just new into the cryptocurrency community, the safe answer for your question will be just follow the trend of people who invest into the top performing or ranked cryptocurrencies which is just easy to search over the internet. Investing into those Altcoins that belongs to the top rank will be the safest choice and move for newbies specially for those who do not really have a background experience about cryptocurrency. Top ranked Altcoins like Ethereum will be a good choice because it has already proven its capacity and capability based on its past performance in the market and it is also one of those cryptocurrencies that people demand aside from Bitcoin. But if you already have background and you are up into exploration into new Altcoins or even those that have already existed a long time ago, you will be able to find potential Altcoins that is worthy for trading, and you will be the one to determine and decide based on your standard for a cryptocurrency coin. Doing research for your own sake will be good on looking for potential coins but since you are new, getting into the top ranked Altcoins will do for now until you familiarize everything about cryptocurrency.