The moment is right, we are near the bottom and the reverse will start soon, good moment to take your part into the game. I would always put my money in any of first 10 CMC altcoins. My choices are BTC, XPR, ETH. Also, it depends on what your goals and preferences are, but if you are looking into giving a chance to a new and unknown project, smart choice will bring you a long term benefits. The things you should look at when making the decision: transparency of the project, white paper, names behind the project, idea, work developers are putting into it daily, activity of the community, availability on the exchanges, CMC, etc. They project that I am looking at right now, BTCN seems to have all the above for now, it reached CMC in no time and it is already present in couple of known exchanges.