I suggest if you want to invest in altcoins yku can buy this waves ,ethereum, qtum ,komodo ,taas , dash , litecoin, monero, zcash and for sure if you have that you can earn a lot of profit in the future that coin is good for longterm investment . Many people become millionaire because of that coin so if you want to become millionaire buy that. And domt forget to buy bitcoin on your list because for sure it will increase more.
All of them are good as an long term investment and if you wait for the right time then you will definitely get best results out of it and even if you don't become millionaire you can expect good returns from your investment as even your capital will play key role in deciding your profits.