I will suggest that Ethereum would be the best choice. Ethereum is the most popular cryptocurrency at present after bitcoins. Also with a market capital of 40 billion dollars it has one of the strongest development teams. Being one if the most popular cryptocoins available in the market right now, there are good chances that Ethereum will be $500 by the begining of 2018. It already has proven a track record of tested technical ability to handle programmatic crisis mid flight.