Most of the coins from 3-4 years ago are nearly gone. That is the nature of cryptocurrency, coins cannot live without investors, supporters in short their community. People move to better coins to gain more income, so the old ones disappear.
That's most of the small altcoins that never really contributed anything in the first place, most of the tokens and coins from 2014/2015 that actually contributed something, or at the very least had some kind of significant backing, are still alive and kicking. A lot of the newer tokens are stronger than some of those other cryptos ever were, and I have a feeling they'll be sticking around for a while. I also have to say that i am getting paid to promote Fanchain, but I do believe it is a unique and viable concept that'll last for a long time simply because of the effect it can have on one of the biggest markets in America: sports.