The market is a lot of good and bad altcoin, it is difficult to accurately determine the future of it. In addition to the altcoin supported by $ such as TUSD, USDT, USD Coin .. the market also has altcoin supported by gold. I see these are altcoin very potential, please refer and understand about them. It has a very bright future! Example: BDT, Maker

Learn more about investing in stablecoins
https://medium.com/makerdao/part-3-the-strengths-weaknesses-of-stablecoins-62f13b592e3f