As of August 2018, there are over 1600 cryptocurrencies that exist, according to Wikipedia. I know that Wikipedia isn't the most reliable of sources because anyone can edit it whenever they want, but the point is the number of cryptocurrencies being introduced. Some of the new cryptocurrencies I've heard were DeepBrainChain, ByteCoin, IOST, and Elastos. There's also a new coin called
Virie, which is apparently a cryptocurrency used to crowdfund and jumpstart the Virternity Project, a project that aims to digitized our minds, economy and the society. I believe that not all new coins aim to scam people, but do we really need more cryptocurrencies? Do we need new cryptocurrencies for every project that exists? Why can't there be one or five cryptocurrencies that all projects can use?
Wikipedia is more reliable than some people think in fact, even if anybody can edit it. It ends up being an strength at the end in most cases.
I personally believe that so many cryptocurrencies it's unnecessary, but we also have to understand that they use those coins to fund startups and at the end they just keep them instead of eliminating them after - Since a great part of people buying those coins is precisely with hope to get big profits in the future.
We only need Bitcoin and Ethereum at the end.