Some good altcoin that I think we should buy are Ethereum, EOS, Stellar and Cardano. These are high value altcoins, they are likely to grow in the future and promise to bring a lot of profits to investors. My favorite is Stellar and Cardano. Stellar has impressive growth rates, its price is pumping up very fast. Cardano overcome many of Ethereum's faults. It has good scalability. I believe that Cardano will become a rival to Ethereum in the future.