just a little common sense will show its a shady site
check https://vaultmex.com/trade/DOGE/BTC




there are 646 Millions of doge to sell
for compare doge/btc selling on other exchange
coinexchange 53 Millions
bittrex 300 millions
hitbtc 690 millions
poloniex 629 millions


and in buying, there are more 110 btc order like bittrex


and it's same on all other coins, all is fake to make appear site as active and with nice arbitrage to do, but once you deposited you are screwed

STAY AWAY!!!