On what bases I can buy altcoin?I want to invest in altcoins can you suggest me how can I see the quality of coin and that would be good profitble for me.
Nothing requires you to buy altcoin at the moment, because I think altcoin can not match the bitcoin now, even if any coin you buy is actually good.
So make sure your mind is conscious when buying coins by knowing all the risks that exist in every business / investment.