So what is the alternative of Polo? I still don't have anything on it, so I can choose another one if it's safer.
try to help,,
for me polo is good,, i trade on bittrex and poloniex,, i never got problem

but polo is my 2nd exchange to trade,, the 1st exchange for me is bittrex
maybe you can try bittrex as your 2nd choice to buy alts
thank you