Yes you are right there are too many altcoins in market now . If you plan to invest for long term you need to find the best coins. According to me the most trusted altcoins in now a days are altcoins like ETH , NEO , ONT , TRX etc. These coins are really strong and can give you a huge profit in long term holding. But always do your own research before investing your money in anything , dont blindly followe anyone.