not all altcoin have a good future,, maybe a lot of alt will dead and just few altcoins will survive
so,, keep invest your money in the best altcoin with great features insides

I do not think that all of them have a good future, now there are very few good projects that are aimed at a long period in the market, and generally I think that those new tokens that are released in 2017 will lose to the projects of 2018.