Investing in one altcoin is not a good decision, sorry to admit it, you may split your money into several alts. For-profit purpose, you may buy BCH coin now, because when the market will start growing again, BCH price will be increasingly higher than any other alts! Otherwise, if you want to hold for a long time, then buy ETH, XTZ, BNB, NEO!
Buying Alts with progressive approach really have a bit chance to take money from this industry, research and get your proper assessment before dealing and start placing your money. Every coin that being shared is opinion based most are coming from investors own holdings, without your understanding you'll be prone to got stuck and be scammed by developers who are intentionally developed project that don't have any real business.