One Account For All Currencies & Cryptocurrencies？
How is this done, I have a saifu account, and can I associate it with my bittrex, poloniex and binace accounts?
No, our account can be used for the cryptocurrencies deposit, but it doesn't unite the exchanges accounts.
You can store you BTC, ETC and fiat money on your Saifu account, easily convert them and spend fiat from the Saifu card.
You can deposit e.g. BTC to your Saifu account from bittrex, poloniex and binance accounts as well.