I think in the first place will stand Cardano, in second EOS, and in third not yet created at the moment cryptocurrency.
May be! I think! You can see Top 3 coins in 2020 on
https://coinmarketcap.com in top #10
with the development potential of Altcoin at this time will be very good by relying on coins for the future. such as Ethereum, Ripple, and Bitcoin Cash. these three coins in this year have an ever-increasing development. so these three coins are very good to be relied upon.