Since most of the replies here are ripple, litecoin, ethereum and stellar. I suggest you to buy tron. Yes, it has a  big community. It has a lot of development and everyone of us is waiting for that moment. Buy tron right now or you miss the train when it pumps high. You can also buy neo because someday, it may dethrone the ethereum due to the clog of network. In the end, it is up to your decision.