In the first week of January 2018 popular exchanges like Binance, Bitfinex, Bittrex have shut down new users registrations to maintain the quality of exchanges. This is when the Gate.io name popped up and after trying for almost 1 month, this exchange seemed to be a solid pick for 2018. The mobile app is fully functional and lets you also add fiat money using AliPay account. You can trade BTC, ETH, USDT, QTUM for any other crypto of your choice.
Always pay attention to Bitcoin. Most altcoins (every cryptocurrency except Bitcoin) are pegged more closely to Bitcoin than Asian currencies were to the USD during the Asian Financial Crisis. If Bitcoin price pump drastically, altcoins price can go down as people try to exit altcoins to ride the BTC profits; inversely, if Bitcoin prices dump drastically, altcoin prices can go down, too, as people exit altcoins to exchange back into fiat. The best times for altcoin growth appear when Bitcoin shows organic growth or decline, or remains stagnant in price.