This is not a joke and not from some illiquid exchange.
This happened today on Binance at LTC/PAX pair.

Keep in mind withdrawals from Binance are closed until todays maitenance that will take 5-6 hours. Sick things may be happening till then.

So now you cant depo or withdrawal. Thats why i always say - have accounts on many exchanges. Then your trading doesnt stop.

Still you can make accounts on those to be ready for trades:

• Bitforex - this is top10 BTC/USDT vol exchange
• BiBox - amazing China exchange, i think its gonna be the next hot thing, top10 exchange too
• KuCoin - similar to the other two with NEO and ETH pairs, just had interview with them - https://fuk.io/exclusive-interview-with-johnny-lyu-of-kucoin-exchange/
• CoinExchange - many ETH tokens and anon coins like ZEC XZC EXCL
• COSS - many deals on ETH tokens for arbitrages
• BitMex - Leverage trading of BTC, EOS and many others, superb liquidity

PAX is a USD pegged coin.

Check my latest interview with Xinxi of LTC - https://fuk.io/exclusive-interview-with-xinxi-wang-of-litecoin/