well yes all this matters as new coins are not being accepted by several exchanges like bittrex, polonix and many more but i would say that they are not even safe to use as we all are aware of the prices of bitcoin, bitcoin cash which are really dropping alot due to some crap news spread across the web.
So its better to opt for decentralized exchange as i came across a list of top decentralized exchanges for trading in cryptocurrencies as they support a lot of coins to trade on as well as they are much secure to use.