Indeed the Ark.io project has been running since 2017, until now it still exists in several large exchanges, especially such as Bitrex, but over time there are many Altcoins / Coins that have very good potential to be invested in 2020 / next year. , for example BNB, XLM, XRP, TRX, ETH, IDNA, have good potential this year to be invested in the next year, because a number of people have already done that, even strongly believe that the coins I mentioned will grow well in the future , it does not mean that I doubt ARK.io, because I also know this coin from the very beginning at the time of their promotion in the Cryptocurrency world to this day I still admire it ...