Frankly this is a false allegation to speak in a blunt manner without any evidence or whatsoever. Altcoins are not useless if you know how to use them that is. It is what we use in collecting money or it is needed in some projects. Altcoins are short term investment and it is used differently.  There are so many altcoin projects like ETH or EOS and many more. How can you say that altcoins are useless. You can make money off those altcoins the only problem is that they depend like they are really dependent on BTC price but they are not useless.