all altcoins are just scam for now, included monero. there is no real use for monero. the mainstream coins are bitcoin, litecoin and dogecoin. these three coins creating their own voice/news outside of bitcointalk and working hard for cryptocurrency as whole. chance we all have heards about bitcoin, litecoin, dogecoin on news, social media and other sources. monero investors are just scammers within bitcointalk community and it don't even deserve this thread.
There are no real uses for any coins, Bitcoin included, with the possible exception of a bit of
gambling, trading between each other, and a relatively small amount of dark market stuff. They're all about future potential right now. The total user base of cryptocurrencies is a maybe (very optimistically) a million people out of 7 billion (i.e. 1/7000 of the world population). Or 1/1000 of the so-called developed world.
A lot of Monero activity occurs outside bitcointalk and the Bitcoin world entirely. I'm sure the other credible projects are doing the same.