Bittrex has officially announced delisting over 80 coin, please check before you lose your money because those exchange I don't know what is wrong with them..
Nothing is wrong with them. They clean up their exchange and prevent their blind users from investing in utter garbage coins.
More reliable link than just a random site;
https://support.bittrex.com/hc/en-us/articles/360001609031-Wallet-Removal-on-March-30-2018If you browse through that list, you'll see that a lot coins are being delisted because of network/wallet problems the "developers" behind the coins don't want to fix, and even don't care to fix. The removal concerning 80 coins just shows how much crap was listed on that exchange, and I'm happy that Bittrex is doing that. It perfectly fits within Bittrex's aim to become more of a professional exchange. In that regard, people shouldn't be suprised to see Bittrex clean house completely at some point, just keeping the main coins listed. If all exchanges do this, the shitcoin market will shrink even further. Free tip; Poloniex might follow too.