While no one knows exactly where cryptocurrencies are heading exactly, most will agree mainstream adoption is on the horizon. When this happens, the multitude of coins being traded is likely to thin to a few. Or at least thats what history would have us believe. Youtuber Ivan on Tech - a cryptocurrency youtuber and developer has drawn the interesting comparison to the infant car industry in the 1900s. 
The vast majority of "Defunct Automobile Manufacturers" Where present in the early 1900's and where out of business just years later. The overall trend being a move from many suppliers of a new technology to just a few long standing survivors today. This is also similar to rail road mania in the 1800s that saw 100s of rail road companies established. There are many examples of this in history.
So the question is, will this be indicative of cryptocurrencies future? I believe that it will be. This places an emphasis on buying quality coins that have a long term value proposition.
Video: 
Wikipedia: https://en.wikipedia.org/wiki/List_of_defunct_automobile_manufacturers_of_the_United_States
