It becoming harder now to choose top potential coin to buy nowadays. I can only suggest to buy the top ten coin in coinmarketcap. But the top ten also is still battling in volatility right now. So it makes me wondering which one to buy too. Maybe bitcoin or ethereum is the best choice for now.
I see many potential coins popping in and out of top-100 all the time.
Check out ARK, solid project with funds to continue developing many many years.