This is incorrect. There are a LOT of "shitcoins" on Poloniex, Bittrex, Cryptopia, etc. They cant screen all coins to determine whether they are ponzi coins or useless arse coins. So just because they are on the major public exchanges does NOT mean they are cool beans. As a matter of fact, if you look at the latest "shitcoins" posing as cutting edge in terms of product/services via shiny glossy marketing material, you will be floored. These guys raise $66million in 4 hours or $25million in 4 days blah blah blah. The whales and investors do their Pre-ICO/ICO PUMP dance and then immediately afterwards, they do their Post-ICO party toilet DUMP! Sorry boys and girls, we took your money. Thank you for your cooperation.