The biggest altcoins will survive. Such coins like Ethereum, Ripple, NEM, Dash, OmiseGo are already used by many companies, they have good reputation and provide a lot of new opportunities. But most of little altcoins will die if it is no demand for them.
I agree with you that a reputation altcoin will last longer, and altcoin provides a great opportunity for those who want to invest in it. Such ethereum is now widely used by companies as payment.