If trade cryptocurrencies, you probably come across the most infamous stable coin : Tether (USDT). Tethers are pegged to the USD dollar and are used in many exchanges that don't deal with Fiat (Binance, Poloniex, Bittrex). On paper 1 USDT can redeem $1 USD from the Tether platform, but there has been a lot of accusations of a Scam. This video explains what Tether is and its limitations.