Little by little the old altcoins give way to the new. Therefore, it is important to get rid in time of coins that in the future do not have much chance of growth compared to their newly minted counterparts.
But there are still who dominate until now it still exists, those are coins that we need to benchmark, we should study why it exists that long, how the roadmap being developed, it is our guide in selecting real coins that don't just vanishes by the time.