Poloniex is the largest US crypto exchange and the world's largest exchange for trading bitcoin. Commission for operations depends on their daily volume in bitcoins, and does not exceed 0.25% for the buyer. To deposit funds on a deposit, only crypto-currency wallets are supported. To start trading, you do not need to verify your account, but the daily limit on withdrawal will be $ 2000. For a verified account, the limit will be already 25 thousand dollars per day, but recently the exchange users began to complain about delays in payments.