Altcoins are basically useless except for demonstrating/testing out new ideas or perhaps as a fork if Bitcoin got too corrupted.
at this moment, the only use any altcoin out there has is just to put money in a few people's pockets. if you see the price change of any altcoin, you can see lots and lots of pumps and dumps which a few people are getting rich by.
Most the use of most altcoins is indeed to make money to a small number of people.