It seems to me that now coins that are actually used for making payments are bitcoin and ethereum. Maybe a couple more coins. The remaining coins are a tool for manipulation and trading.
At the moment, when joined a lot of ICO projects, I think that the real purpose of altcoins to improve the technology of this market and make the cryptocurrency popular in payment. If in the future, cryptocurrency is accepted by the government, I think it will be popular and be used by more people in the world.